Tbi 350 Rough Idle

Re: OMC Chevy 350 Rough Idle I completely agree with you on thatI'm just on a budget right now. We’ll cover the most common causes of rough idle below. O The truck will continue to run rough even when warm and at a stop light the idle will drop to almost wanting to stall but then will surge back up and then drop to almost stalling and so on until i start driving again. The mechanic found a shorted wire that was preventing the injectors from firing. I also don’t recommend a 454 TBI unit as they were designed to idle big block engine and often cause idle and light throttle fuel control issues on SBC so save yourself and me some headaches and get a bored SBC throttle body. It still. Dirty Fuel Injector Modern vehicles are fitted with fuel injection systems, which inject fuel into the cylinders to create a mix of air and fuel to burn. \015\012\015\012Problem is it idles way too fast. most, if not all the info below will apply for all engine options on this though. 5" True Dual No Mufflers I purchased this 1987 Chevy K5 Blazer Silverado 4x4 in 1998 for use as a daily driver. (factory 210hp rating was a bit optimistic from my dyno testing) cam choice in my opinion is the most important decision you make on that engine as its not only the easiest way to screw up TBI injection but it also sets the whole. Below are the four most common. Today same thing happened to me but in reverse. new parts include,. Behind that reveals a torx screw. phunger · Noob. Rough Idle When Starting Cold, Then Goes Away When Engine Is At Operating Temperature More Details Below I have an older, low mileage vehicle with a V8 engine. This kit is one of only two made for Jeeps that can be ordered California smog legal. Reviews of the 4 Best Spark Plugs for 350 TBI. TBI 350 rough idle help Discussion in 'Engine Performance + Maintenance' started by daturbosix, Jan 28, 2016. This was quite bothersome descending hills in low range/first. It frequently stalls when shifting from park to drive. 0 L throttle body and am having some engine problems recently. PCM 351W running super rich, barely idles, runs rough suddenly. While there are several items that control the idle on a 1992 Chevrolet C1500 5. GM TBI 350 stalling when starting act like running out of gas when passing somebody and blowing igni Chevy Tahoe 5. Also check the TBI base gasket for leaks. The idle speed. The throttle body consists of an air intake port and one or more fuel injectors, depending on engine displacement. spark plugs and wires. Rough Idle Problem Help! Suburban Car Forums. 7L TBI, rough idle loss of power OK i have changed the O2,tps,egr,egr valve,Idle air control valve, 2 new injectors, fuel filter and pump and screen. On later model vehicles, a check engine light may accompany the issue. You can hear the. 1991 K5 TBI 350 with SM465. I finally got my new GM replacement motor in my 94 C1500 350 TBI, but it is idling really rich, my wideband 02 was saying 10 to 1. Ok here is the deal. all electronics 1992. I drove my Jeep to work one day a couple weeks ago. Cleaned throttle body, installed new gaskets, new sensors, O2, MAP, TPS, ICM, EGR, IAC, COOLANT TEMP, all except for ECM. One out of five times the idle will seem to fall out when taking it out of gear and coming to a stop. INJECTION (TBI) This bulletin defines the controlled idle speed and minimum idle air rate specifications for 1987 and 1988 model year trucks for all engine applications with TBI. Re: 95 Chevy S-10 4. Discussion Starter • #1 • Jun 1, 2018. You probably have a bad idle air control valve. Jump to Latest Follow 1 - 20 of 21 Posts. I dont know y it's idling so rough it only does this when it starts to get warm so i dont know what it is. Spark Plug Wires – While not every model and engine combination of vehicles today comes with spark plug wires (a lot are now coil on plug), if your F350 happens to have. Generation I (1955-1980) Firing Order. Engine smooth at idle rough at acceleration Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › Engine smooth at idle rough at acceleration This topic contains 8 replies, has 2 voices, and was last updated by Matthew 7 years, 7 months ago. The General Motors Rochester Throttle Body (TBI) is OEM original equipment. The idle speed. It basically almost dies out, and then surges back to life (probably a little higher than normal idle), then repeats continuously. Than it smooths out as truck warms up and runs like a champ and when its warm truck starts right up. When a vehicle begins to idle rough or stall, the idle system requires service. Also, they must be willing to tolerate the down side of these type street engines. If truck doesnt turn on, facing the firewall from the engine bay, on the far right of the physical TBi, you will see what looks like a mini freeze plug, dig it out. Howdy - My father in law's '91 Chevy was running poorly, so we put new plugs, wires, cap and rotor on it, and it's running better, but it it still surging at idle. rough idle 350 SBC. Fuel pressure is good. Re: 87 Silverado 350 tbi idling rough « Reply #6 on: April 13, 2011, 07:41:37 AM » Have your key turned so the check engine light should be on,carefully move the wires behind the box. Since 1938, Edelbrock has manufactured its core products in the USA for quality & performance. Spraying starting fluid around the intake doesn't reveal any vaccum leaks. Below are the four most common. Just low idle at 400rpm and has a slight stutter. I have to turn it over several times in order to get it to start than I have to feather the gas alot in order to keep it running after a few minutes it idles on its own really low idle. Ok here is the deal. All plugs are new with only about 5 mins on them. /260hp overheating issues. Discussion. I own a 1989 Wrangler YJ 2. GM TBI 350 stalling when starting act like running out of gas when passing somebody and blowing igni Chevy Tahoe 5. At the next stoplight my baby starts making some chugging noises, but not bogging down or anything like that, and my CEL came on. No lights or warnings, doesn't seem to be limp mode. All went well except I experienced the engine surging at idle. It frequently stalls when shifting from park to drive. 1989 Chev Suburban 4x4 350 tbi. phunger · Noob. 1994 Tracker 4x4 LSi auto 1. Today you can still net yourself a decent one for under $5,000, but chances are it needs some help. Take a look down the throat of the TBI unit. Throttle body is clean. I have to turn it over several times in order to get it to start than I have to feather the gas alot in order to keep it running after a few minutes it idles on its own really low idle. little high for idle rpm on a 350. Sounds like a demented drummer Here's what I have done - Carb completely cleaned, rebuilt, and all parts measured and in spec. While driving if you. It is a 1986 c10 pickup with a 350 engine Holley 4 barrel carb. It is idling and then it almost dies, and then goes back to idle. ^+1 I am running the larger LT1 cam (. It feels like a misfire. I've had a rough idle problem with the Chevy 350 engine in the van and haven't been able to solve the problem for over a year now. 7 TBI, the L05 I believe. Jump to Latest Follow 1 - 1 of 1 Posts. 88 Silverado 350 TBI A/T Hard start Rough Idle stalls in gea. changing out the seems like forgotten idle air control on a chevy tbi. EGR ports are clean, but I'm unsure how to check and make sure it seals closed. This started as a surging while driving at constant rpms. Just low idle at 400rpm and has a slight stutter. - done all the basics and even replaced the idle valve - but still the idle is too high - Cheyenne P/U 1989 - 305 small block with TBI injectors. 1988 Wellcraft 350 Merc. I can rev it up and it sounds plenty healthy. Also make sure the gasket is not leaking around the base of the egr valve. It feels starved for fuel. you're almost at 1000 hot idle. I will have to replace it, but with wire connected it idles better but still missing. The odd-fire design cause a the engine to idle a bit rough. So I have a 95 TBI 350 with about 190K miles on it. This is a 1975 with later model 1979 engine, the truck is running very good until one day at the stop sign I feel the engine is idling rough and the truck is not running that good. And if i slow down to make a stop it shudders til i get my speed back up or floor it. Has new plugs, cap & rotor, air filter. When I pulled them to do the compression test they all are lightly coated with black soot. I have a 90 chevy 1500 witha 350 tbi crate motor in it it only has 30k miles on the engine it has edelbrock headers vavles valve covers, accel tbi and other minor mods, i want to put a camshaft in but not so sure what all i need and what the better application would be, i want something that i can still drive everyday but take to the track every now and then, but i love that rough idle sounds. While driving if you. html There are many questions about this diagram known as the Venn Diagram, making it very difficult to interpret. The engine starts easily but idles very rough and can only be kept running by blipping the throttle; when first started. )Timing light and the conversion package. One out of five times the idle will seem to fall out when taking it out of gear and coming to a stop. Replaced the Oxygen Sensor and Computer Board. First 2 of 3 Go to page. Now when its cold it runs really rough coughing and sputtering. 4:Poor Idle, Very shaky idle, or no idle at all If you want to check your EGR manually you sometimes can, however the EGR is only meant to be opened under normal operation temperature in excess of 2300-2500 RPMs , so unless you meet these conditions it is not a good way to manually check the plunger valve for movment. 2) When letting the throttle close quickly (i. It dies and labor so really bad 2 Answers I've replaced the injectors and the fuel filter. Rough Idle on my Chevy 350. Buy 88-95 Chevy Silverado TBI C/K / 88-91 Chevy Silverado 5. Jem77 Gearhead. The wire colors are the same as the factory wire colors for car and truck TBI injected engines. still has distributor and rotor and capacitor. Posts: 35 Likes Received:. Maintenance/Repairs. Re: 87 Silverado 350 tbi idling rough « Reply #6 on: April 13, 2011, 07:41:37 AM » Have your key turned so the check engine light should be on,carefully move the wires behind the box. 88 Formula 5. 3 liter V-6 engines. IS - 3rd Gen (2014-present) - IS350 rough idle issue - Hi members I recently noticed my IS350 engine idle rougher at around 600 RPM and with slight vibration in drive mode with AC off. My chevy 1987 chevy Scottsdale with a 350 tbi sometime runs smooth then sometimes runs like its running with half the power or less like it has bad gas or something. Full tune up just done. A common concern DIY Toyota and Lexus owners call CARspec for is a rough idle, starting and dying, or a hard start just after replacing or disconnecting the 12 volt starting battery. Discussion Starter • #1 • Jun 1, 2018. when the throttle is released the motor returns to a good idle. patricksullivan. The copper seal can leak, resulting in rough idle -- I got my 300D cheap because #4 didn't fire at all at idle and #s 2 & 3 were weak. Idle is good and WOT seems normal (will spin the rear tires and sounds like it's hitting on all 8). I've changed all the plugs,wires, rotor and distributor cap and a new fuel filter and still nothing. Re: OMC Chevy 350 Rough Idle I completely agree with you on thatI'm just on a budget right now. Anyone have a 88 454 tbi engine harness 1993 chevy wiring diagram data 87 gmc full dish work 722k 16197427 01 accord 1997 block 1995 1500 motor mercruiser 350 4x4 fuel gm distributor efi system keep ing ecm b fuse 1988 truck base 85 air hardin marine harnesses pinout 93 5 7 4 3 schematic 1991 suburban 92 mdx box for i 1990 with 4l80e out of. memory serves, should be no more than 750. Every TBI will be Flow Bench tested, calibrated, and idle adjusted making it ready for easy installation. One big advantage of the Dauntless 225 V6 is the heavy flywheels used on these engines. 459 117 LSA) whatever year that was, in my 350 TPI 5200 lb K1500 and it PULLS. Re: 350 tbi rough idle no power Feb 20 2014, 3:43am My distributer did in my 88 K1500, replaced and it fixed most of the issues because for some reason it was causing voltage fluctuations. When idle speed changes significantly or stalling on throttle release occurs, a problem is indicated. The truck has a NV3500 so the whole truck would surge. Re: extream high idle problem on 1990 chevy 1500, 4. plus it labors when in gear. Take the egr valve out and see if there is a piece of carbon stuck in it. Now I have an irregular and rough idle - sometimes stumbling and pulsing with vacuum varying from 10-15". Mine was the same till I did this,hopefully the light will come on then. Either way this is without taking the FPR into account, I was measuring at the inlet, fuel line disconnected and plugged into a pressure gauge (dont have the materials to make. Chevy 350 tbi wont start has spark and fuel. This is a 1975 with later model 1979 engine, the truck is running very good until one day at the stop sign I feel the engine is idling rough and the truck is not running that good. Turn your key to the off position and stop your engine. Hopefully, the check engine light is on. You can use a late 80’s or early 90’s GM TBI definition. I would say that is varies a few 100 rpm. Plugs, wires, cap and rotor, fuel filters, oil filter, and IAC, along with manifolds and risers, flame arrestor and throttle body cleaned. Talked to the guys at the local shop they thought it was the idle air control, replaced that and it made very little change. still has distributor and rotor and capacitor. Rough Idle on my Chevy 350. 1989 Suburban with TBI 350. Below are the four most common. So I've swapped a 350 tbi & 4l60 (non E) from a 1990 cadillac. Rough Idle Problem Help! Suburban Car Forums. Jump to Latest Follow 21 - 40 of 55 Posts. We wrote about something similar on the Prius, being a common cause of the MIL. Posted by 5 years ago. When the engine is started cold, regardless of the outside temperature, the idle is rough and there is a noticable power loss. plus it labors when in gear. Sometimes,not all the time, it idles rough and I can see the needle jumping very slightly and the car shakes a little with it. I just received the truck from my dad and im trying to diagnose some issues it has had for some time. Each TBI comes complete with injectors, TPS, air control valve, and throttle body bushings. Reconnect the IAC valve. I have replaced the fuel filter, oxygen sensor, air filter, it doesn't matter which tank I run it on, I've used fuel dryer (Heat) changed pvc valve, could be a injector going bad?. The truck has a NV3500 so the whole truck would surge. I have checked the vacuum lines, replaced the EGR, and have a new oxygen sensor. runs rough and feels starved for fuel when in drive and under any sort of load, barely drivable. Even 150 to 155psi on wet compression test. Do It Yourself, Boating on a Budget - 350 Mag rough idle - 2007 350 Mag MPI that is running a bit rough at idle. Mile truck maybe 160* when i started the truck the idle dropped to 500the in park instantly and stumbled when put in gear. Now I have an irregular and rough idle - sometimes stumbling and pulsing with vacuum varying from 10-15". Part of why it runs so well was getting rid of TBI but it is a super mild cam and I'm sure it would be a big improvement even under a TBI setup. So I just. Consult a service manual or see below for any check engine light code definitions. I just bought this machine, it wouldnt even idle so I cleaned the carb and reassembled it, cleaned the tank, replaced the fuel line and set the carb to the initial settings per my manual. MAP sensor is new. I've had a rough idle problem with the Chevy 350 engine in the van and haven't been able to solve the problem for over a year now. This engine is a performance replacement for 87-91 Corvettes, smooth idle great daily driver. but ill try checking the EGR valve and if i find. TPS is new and and at. The truck is now running but very rough. 1) Rough idle (not awful, but far from ideal). Idle is good and WOT seems normal (will spin the rear tires and sounds like it's hitting on all 8). Turn the screw to adjust the idle speed to 650 RPM +/- 50 RPM. Very noticeable in second gear at about 25 mph. Turn your key to the off position and stop your engine. 8 v6 cause these issues along with stalling at light and when shifting into gear. So since you all had a lot of good input on Troys TBI problem Ill give it a whirl. My 1995 5. Take 5-liter Mustangs. This is a 1975 with later model 1979 engine, the truck is running very good until one day at the stop sign I feel the engine is idling rough and the truck is not running that good. I have a 91 Chevy 350 TBI in my truck. 1 For access to the idle stop screw, pierce the cap with an awl and carefully pry the cap from the side of the throttle body Access our Chevrolet Full Size Cars 1979-1989Throttle Body Injection (TBI) Repair GuideMinimum Idle Speed Adjustment by creating an account or signing into your AutoZone Rewards account. Other than at idle truck runs great and gets 17+ MPG on the interstate. The porcelain was a nice tan color (like it should be )on all 8 of. 88 Silverado 350 TBI A/T Hard start Rough Idle stalls in gea. 1994 Tracker 4x4 LSi auto 1. 350 TBI ilman idle air control valvea. These would both cause the symptoms that you are experiencing. Idling will not cause her to die though, only movement and shifting. 267, 305, 327, 350, 400 cid. The motor idles fine but when the trottle is pressed the motor starts coughing and bucking, then starts to die. Jump to Latest Follow 1 - 5 of 5 Posts. One of the most common problems is likely a rough running or poorly idling engine. Mine will run rough on warm up. rough, chevrolet, 2500. With the "Rough" idle cam, the vacuum will be under 10". Idle is good and WOT seems normal (will spin the rear tires and sounds like it's hitting on all 8). Joined Aug 7, 2017 · 20 Posts. Turn the screw to adjust the idle speed to 650 RPM +/- 50 RPM. Just low idle at 400rpm and has a slight stutter. This version of the engine and parts from these Jeeps can be used to swap a Buick V6 into your Jeep. These vehicles featured a 350 ci, 5. The throttle body consists of an air intake port and one or more fuel injectors, depending on engine displacement. Sometimes,not all the time, it idles rough and I can see the needle jumping very slightly and the car shakes a little with it. 5" True Dual No Mufflers I purchased this 1987 Chevy K5 Blazer Silverado 4x4 in 1998 for use as a daily driver. I have a 92 350 TBI she is hard starting when its cold. 3, 2012, Jenner, CA. PCM 351W running super rich, barely idles, runs rough suddenly. I installed the PCV valve and started the engine and warmed it up and the problem was still there, so I started checking things over making sure all the rubber hoses fit tightly. Reviews of the 4 Best Spark Plugs for 350 TBI. spark plugs and wires. So I have a 95 TBI 350 with about 190K miles on it. Jeep will not start back up once shes been running or after she stalls unless she sits for 10-15 minutes, and she will start fine but a little rough. A Venn diagram is made when a set of pairs are placed into a tube which begins at one side and goes down to the other end. Also make sure the gasket is not leaking around the base of the egr valve. Rough idle and heavy smoke on accel. 7L Transmission: 700R4 Transfer Case: NP208 Front Axle: GM Corp 10 bolt Rear Axle: GM Corp 10 bolt Gears: Stock Differentials: Eaton Posi Suspension: Stock Exhaust: 2. even for an automatic. Also check the TBI base gasket for leaks. These vehicles featured a 350 ci, 5. you're almost at 1000 hot idle. Hey guys I know it's not Jeepster but there is alot of strong experience in this board and the fullsize board is pretty small. Hello!, Heres my problem. I just received the truck from my dad and im trying to diagnose some issues it has had for some time. Each TBI has a complete one year warranty. changing out the seems like forgotten idle air control on a chevy tbi. 88 chevy 2500 tbi 350/5ml60. Behind that reveals a torx screw. The odd-fire design cause a the engine to idle a bit rough. MAP sensor is new. Jump to Latest Follow 21 - 36 of 36 Posts. wants to die when put in gear and blows black smoke and looks like fuel out exhaust … read more toolpusher08. The porcelain was a nice tan color (like it should be )on all 8 of. A Venn diagram is made when a set of pairs are placed into a tube which begins at one side and goes down to the other end. i engines in slightly 83726 lighter vehicles. If you have the throttle just barely open it will smooth out until it upshifts then it does it again. MikeC66 · Registered. It is a 1986 c10 pickup with a 350 engine Holley 4 barrel carb. We wrote about something similar on the Prius, being a common cause of the MIL. Most of the time the culprit is going to be the ignition system, although there are a myriad of other causes. I lost a little vacuum at idle, which made it run in a different MAP cell making it rich. Replaced the Oxygen Sensor and Computer Board. 5" True Dual No Mufflers I purchased this 1987 Chevy K5 Blazer Silverado 4x4 in 1998 for use as a daily driver. couple weeks ago i went out to pick the kids up. You probably have a bad idle air control valve. Got her fired up in the driveway, set the initial timing, had to re-adjust the throttle blades to get the IAC counts where they needed to be, and I bumped the idle up from 600 to 700 RPM. my question is will a combination of a toque converter out of a v6 700r4 stall be too low (1000-1100) a oem alternator from 3. Posted by 5 years ago. '87 Chevrolet TBI 350 runs rough under load. Plugs, wires, cap and rotor, fuel filters, oil filter, and IAC, along with manifolds and risers, flame arrestor and throttle body cleaned. 3 wiring harness and 02 sensor. 7 - These CFM Tech Ported throttle Bodies are designed for maximum airflow with ported throttle bores, larger butterflies, thinned throttle shafts, button head butterfly screws, and machined top air entrance. spark plugs and wires. Car has been idling rough when in drive at stop lights, ect. if it continues to idle roughly after, then it may be loading up. All went well except I experienced the engine surging at idle. I actually took it apart to change the stand pipes and dummy plugs and neglected to tighten down one injector and it hydro-locked on me. All plugs are new with only about 5 mins on them. 3L TBI - Idle troubles Hello MT, The truck has electronic ERG. 0L Power Stroke Diesel - '06 F-350 idles rough - Hello again guys, I started a thread about this awhile ago but figured I'd start fresh since a lot has been done since. 7L Cold Air Intake - Chrome + Filter(1988 1989 1990 1991 1992 1993. Runs ok except at idle which is a little rough and you can smell that it is running rich. Howdy - My father in law's '91 Chevy was running poorly, so we put new plugs, wires, cap and rotor on it, and it's running better, but it it still surging at idle. So if your GM TBI engine has a very high idle, check your throttle body gasket. 1993 K1500 Sierra 350 TBI with 174k miles Engine has been rebuilt with around 35k on the rebuild. Pushing the throttle at this point causes the engine to stumble slightly before it revs up. I have an idle problem which has gotten steadily worse over the last few weeks/months and now, of course, the day before I leave for a trip to the woods it is idling worse than ever. - Plug fouled with dry black soot (even just at idle for a short time) - Blows a little black smoke on revving. 4:Poor Idle, Very shaky idle, or no idle at all If you want to check your EGR manually you sometimes can, however the EGR is only meant to be opened under normal operation temperature in excess of 2300-2500 RPMs , so unless you meet these conditions it is not a good way to manually check the plunger valve for movment. Turn off the engine and disconnect the negative battery terminal from the battery using a wrench. Since 1938, Edelbrock has manufactured its core products in the USA for quality & performance. I finally got my new GM replacement motor in my 94 C1500 350 TBI, but it is idling really rich, my wideband 02 was saying 10 to 1. Jump to Latest Follow 1 - 1 of 1 Posts. 7L / 92-95 Chevy Silverado V8 5. While cold with the idle still on the high side it seems smooth and normal. Take a look down the throat of the TBI unit. Originally a 305 TBI, it now has a brand new GM performance 350 short block with 113 casting Corvette heads, Holley 300-66 TBI intake, and Holley TBI throttle body with 85lb/hr injectors (professionally cleaned and flow tested for proof), and LT4 Hot Cam kit. changing out the seems like forgotten idle air control on a chevy tbi. if it continues to idle roughly after, then it may be loading up. When driving it shudders erratically at idle when in gear (ie: at a stoplight). )Timing light, condenser, points, and a dwell meter or b. I whiped that out in less than an hour, was obivious as soo as I got the TBI loose that the thing has been sucking in air for a long time. Upon removing any spark plug. 0 L throttle body and am having some engine problems recently. Re: 1994 454 TBI runs rough, misfires, backfires, dark exhaust « Reply #144 on: April 08, 2016, 08:48 AM » Pete, That is not a DSO, it is a regular oscilloscope but it is a neat little tool for less than 150. Tbi 350 Installation – Land Cruiser Tech From Ih8Mud, size: 800 x 600 px, source: www. See our Manifold And Carb Kits, Ford Chevy Pontiac Chrysler Edelbrock is the most respected name in performance. I installed the PCV valve and started the engine and warmed it up and the problem was still there, so I started checking things over making sure all the rubber hoses fit tightly. little high for idle rpm on a 350. First 2 of 3 Go to page. Will need 10. 95 350 Tbi does well idling in park and on the highway but at idle speeds it shudders. changing out the seems like forgotten idle air control on a chevy tbi. 350 Tbi Egr Bypass. Runs ok except at idle which is a little rough and you can smell that it is running rich. 5" True Dual No Mufflers I purchased this 1987 Chevy K5 Blazer Silverado 4x4 in 1998 for use as a daily driver. Than it smooths out as truck warms up and runs like a champ and when its warm truck starts right up. New cap, rotor, wires, plugs, timing set properly. Symptoms are at idle only. One of the most common problems is likely a rough running or poorly idling engine. changing out the seems like forgotten idle air control on a chevy tbi. Replaced the Oxygen Sensor and Computer Board. 3L Alpha One V6 Thunderbolt IV 262 Vortec V6 timing issues, need some smart folks to help. KMD Well-Known Member. Jeep will not start back up once shes been running or after she stalls unless she sits for 10-15 minutes, and she will start fine but a little rough. should all be TBI systems. I dont know y it's idling so rough it only does this when it starts to get warm so i dont know what it is. Rough Idle on my Chevy 350. Does your car idle rough or the speed cycle up and down. Hello!, Heres my problem. While there are several items that control the idle on a 1992 Chevrolet C1500 5. Cleaned throttle body, installed new gaskets, new sensors, O2, MAP, TPS, ICM, EGR, IAC, COOLANT TEMP, all except for ECM. I have replaced the fuel filter, oxygen sensor, air filter, it doesn't matter which tank I run it on, I've used fuel dryer (Heat) changed pvc valve, could be a injector going bad?. 88 chevy 2500 tbi 350/5ml60. 6 TBI Rough Idle and Running. even for an automatic. Dirty Fuel Injector Modern vehicles are fitted with fuel injection systems, which inject fuel into the cylinders to create a mix of air and fuel to burn. Going up a hill (truck would shake and stumble) but not much while idling (slightly if at all) Replaced plugs (two plugs and ash deposits and one plug had oil on it) and fuel filter (filter poured out. ^+1 I am running the larger LT1 cam (. IS - 3rd Gen (2014-present) - IS350 rough idle issue - Hi members I recently noticed my IS350 engine idle rougher at around 600 RPM and with slight vibration in drive mode with AC off. has 350 TBI engine, computer, injectors, throttle body and computer. When shifted into drive or reverse the car will frequency stall. Although it runs when cold started, the engine "hunts" in RPM and engaging the tranny (700r4) will occaisionally cause it to die. Full tune up just done. The idle speed. A misfire may occur when your engine is idling, causing a rough or uneven idle. My 350 TBI in my truck is becoming undriveable with a really bad bog and hesitation/stumble when I try and take off at any rpm or speed. The fuel injectors are located in the middle of the throttle body. even for an automatic. should all be TBI systems. TBI 350 rough idle help Discussion in 'Engine Performance + Maintenance' started by daturbosix, Jan 28, 2016. , if you want to fix it as cheap as possible. MikeC66 · Registered. My 1995 5. It feels like a misfire. It's the same in eco, normal,. In most cases the leaks are on the sides of the engine or in the rear of the engine where the exhaust manifolds attach to the engine, or the point where the exhaust pipes attach to the exhaust manifolds. ( I borrowed it from another project car. Page 1 of 3 1 2 3 Next > May 19, 2011 #1. You did the right checks as far as you could go. Both are roughly the same price and I think. Also, they must be willing to tolerate the down side of these type street engines. Jan 28, 2016 at 7:02 PM #1. It's the same in eco, normal,. 0 L throttle body and am having some engine problems recently. It still has its surging in gear, park idle its smoother. The other kit is the Mopar MPI but it typically costs twice the amount. new parts include,. 1 of 2 Go to page. rough idle 350 SBC. Mine was the same till I did this,hopefully the light will come on then. Iv'e got a 1988 Silverado A/T 1500 with a 350 TBI. 7 tbI I have replaced every sensor on motor had igniton timing redone. My question: Is this normal?? Would like to find input from other SLK. Despite 190,000 miles on the clock she has run perfectly until now, although quite heavy on gas. It will correct itself after about 5 seconds, can usually correct it a little quicker by revving. See our Intake manifolds - 350 320 318 Chevy Ford Marine Victor Aluminum. It is a 1986 c10 pickup with a 350 engine Holley 4 barrel carb. really bad rich idle/91 k-5 chev 350 tbi Post by haleyadventure » Sat Feb 04, 2006 11:41 pm has only 10-12 inches of vacuum at idle-when 15 inches of vac is applied to map sensor, the idle gets way better. Found gas in the oil. Hopefully, the check engine light is on. Something this morning caught my attention i drove about half. My 1995 5. (the only code that came up was, I think 44, which meant everything was working ok. Stumbles and runs rough at lower throttle positions (just off idle). 2002 Indmar Assault TBI rough idle and noise July 17th, 2019, 03:08 PM. 88 Silverado 350 TBI A/T Hard start Rough Idle stalls in gea. Yesterday when we were out. The engine’s computer gives the idle air control valve the feedback it needs to hold a constant rpm. let of gas sounds like a gargling sound like quiet pops from exhaust. Aug 10 2014, 5:51pm. Most of the time the culprit is going to be the ignition system, although there are a myriad of other causes. Jump to Latest Follow 1 - 20 of 21 Posts. should all be TBI systems. Ok here is the deal. IS - 3rd Gen (2014-present) - IS350 rough idle issue - Hi members I recently noticed my IS350 engine idle rougher at around 600 RPM and with slight vibration in drive mode with AC off. I have a 89 chevy pickup w/350 TBI motor. Had car for 5 months and 4K, no issues. PCM 351W running super rich, barely idles, runs rough suddenly. 7L Transmission: 700R4 Transfer Case: NP208 Front Axle: GM Corp 10 bolt Rear Axle: GM Corp 10 bolt Gears: Stock Differentials: Eaton Posi Suspension: Stock Exhaust: 2. Idle is good and WOT seems normal (will spin the rear tires and sounds like it's hitting on all 8). Chevy 350 tbi wont start has spark and fuel. These would both cause the symptoms that you are experiencing. If you have the throttle just barely open it will smooth out until it upshifts then it does it again. Was serviced prior to buying at MB. Also check the TBI base gasket for leaks. I did find the rubber link hose to the MAP sensor and canister purge line were cracked which caused some surging while driving. Each TBI has a complete one year warranty. Buy 88-95 Chevy Silverado TBI C/K / 88-91 Chevy Silverado 5. I can rev it up and it sounds plenty healthy. The fuel pressure regulator is set for approximately 12 psi (30 psi on '94 & '95 BBC trucks). I ran compression tests and all cylinders except #5 read around 105 - 110. The EGR valve took care of a "check engine" light problem, but nothing seems to clear up a rough idle when the engine is cold or heavy ping when the engine is hot and pulling hard on a grade. Its a 94 block, with the 89 accessories/head/etc. Throttle Body Injection (TBI) for a pre-TBI 350 Why: After running my '65 Chevy pickup for a couple of years with the stock '83 drive train (350/700R4), I got tired of the constant battle I was having with the Quadra Jet. 02 sensor and EGR valve from salvage yard. Dirty Fuel Injector Modern vehicles are fitted with fuel injection systems, which inject fuel into the cylinders to create a mix of air and fuel to burn. So I just. We’ll cover the most common causes of rough idle below. Every TBI will be Flow Bench tested, calibrated, and idle adjusted making it ready for easy installation. - Compression stinks (60-70 out of 97), no significant change on wet test - Rough syncopated idle. Other symptoms: An EGR stuck open may include a rough idle, rough performance at low engine speeds, stalling at idle, increase in fuel consumption, fuel odors, and possibly a check engine light on. Everything seems great sitting in park or neutral. All plugs are new with only about 5 mins on them. new parts include,. Jump to Latest Follow 21 - 36 of 36 Posts. A TBI engine is a standard engine with throttle body fuel injection. The motor idles fine but when the trottle is pressed the motor starts coughing and bucking, then starts to die. On a car it's suggested to clean approx every 15,000 miles. i engines in slightly 83726 lighter vehicles. plus it labors when in gear. This would cause a rough idle. I whiped that out in less than an hour, was obivious as soo as I got the TBI loose that the thing has been sucking in air for a long time. the fuel pump is new the filter isnew. My 350 TBI in my truck is becoming undriveable with a really bad bog and hesitation/stumble when I try and take off at any rpm or speed. I replaced IAC, CTS, TPS, ETS, EGR valve, EGR solenoid, FPR, Injectors. Van’s Chevy 350 Engine Rough Idle Problem… Saturday May 20, 2017 Troy Oregon Working on the rough… (1,792) One Way Snakes Catch and Eat Fish Monday, Dec. 7 TBI, the L05 I believe. The other kit is the Mopar MPI but it typically costs twice the amount. 7L TBI, I would suggest the following before I started replacing parts that may not need replacing. '87 Chevrolet TBI 350 runs rough under load. )Timing light, condenser, points, and a dwell meter or b. I've noticed. The engine’s computer gives the idle air control valve the feedback it needs to hold a constant rpm. Today you can still net yourself a decent one for under $5,000, but chances are it needs some help. I put the TBI on the 350 with an edelbrock in take and a adaptor plate to put the TBI on the 4 barrel in take. While driving if you. 2) When letting the throttle close quickly (i. when i went to pull out to leave it sputtered and tried to die under all but the lightest throttle pressure. So since you all had a lot of good input on Troys TBI problem Ill give it a whirl. Jump to Latest Follow 21 - 40 of 55 Posts. Had it towed to a dealership who keeps fixing "part" of the problem. Messages:. Jump to Latest Follow 1 - 20 of 21 Posts. See our Intake manifolds - 350 320 318 Chevy Ford Marine Victor Aluminum. 7 TBI 8 cylinder OHV engine and it idles really rough. 4L Poor Idle Quality, Hesitation, Cuts out, Misfire Posted to Ford Driveability on 1/10/2011 19 Replies At my end with this one, A fleet box truck came in for running rough, checked for codes, none. Today you can still net yourself a decent one for under $5,000, but chances are it needs some help. I get no fault codes when I jump the pins. KMD Well-Known Member. 7 L, it has a rough idle when cold and worsens when warms up. MikeC66 · Registered. Plucked the wiring and touched it up for the transplant. The only way an exhaust leak can cause a rough idle is if the leak was in a place where it could enter the air intake system. Hopefully, the check engine light is on. I own a Chevy Caorice Classic that has a 5. MikeC66 · Registered. A TBI engine is a standard engine with throttle body fuel injection. It also hesitates when given gas in drive. If truck doesnt turn on, facing the firewall from the engine bay, on the far right of the physical TBi, you will see what looks like a mini freeze plug, dig it out. Both are roughly the same price and I think. Quiet and long lasting, but weak fuel delivery. I few weeks ago this weird problem came up, when I go to start it, it would fire then die. Stumbles and runs rough at lower throttle positions (just off idle). I did find the rubber link hose to the MAP sensor and canister purge line were cracked which caused some surging while driving. I have to hold the brake and give it gas to. When it gets to operating temperature and the idle drops more it is more noticeable. 42 open, 94 Z71 Olds 350 TBI. MAP sensor is new. When I pulled them to do the compression test they all are lightly coated with black soot. Try this test also, disconnect the vacuum line going to the EGR valve and see if it improves the idle. Howdy - My father in law's '91 Chevy was running poorly, so we put new plugs, wires, cap and rotor on it, and it's running better, but it it still surging at idle. 1993 K1500 Sierra 350 TBI with 174k miles Engine has been rebuilt with around 35k on the rebuild. Ketju osiossa 'Moottori', aloittaja Jem77, 12. plus it labors when in gear. most, if not all the info below will apply for all engine options on this though. It was fine, then rough idle, CEL, then shut off with no CEL. my question is will a combination of a toque converter out of a v6 700r4 stall be too low (1000-1100) a oem alternator from 3. daturbosix OBS. 3 and isn't real tech savvy so I'm posting for him. plus it labors when in gear. got to grandma's house 10 minutes away and as i pulled in the driveway the car idled with a noticeable shake. The porcelain was a nice tan color (like it should be )on all 8 of. has 350 TBI engine, computer, injectors, throttle body and computer. Also make sure the gasket is not leaking around the base of the egr valve. Got it home just fine. I own a Chevy Caorice Classic that has a 5. My 91 topkick with 366 gas has a small issue when idling. And if i slow down to make a stop it shudders til i get my speed back up or floor it. Howdy - My father in law's '91 Chevy was running poorly, so we put new plugs, wires, cap and rotor on it, and it's running better, but it it still surging at idle. ( I borrowed it from another project car. This all started after I changed my distributor springs to a lighter weight, changed 3 burnt plug wires, and put on collector gaskets. After it is warm it will idle slow and a little rough, almost to the point you think it will die. Very noticeable in second gear at about 25 mph. let of gas sounds like a gargling sound like quiet pops from exhaust. and took off my timing cover to check cam timing. 1995 Silverado, 2wd Air, 5. Mine was the same till I did this,hopefully the light will come on then. To clean a throttle body and the IAC (idle air control) you can use non-clorinated (spell check,I only see it every day)will clean that out and no damage. /260hp overheating issues. With the new $5 gasket it purrs like a kitten. ) I replaced the Map and two pin coolant sensor/switch, and it still was idling rich and seems to have overdrive locked out. Jump to Latest Follow 1 - 20 of 21 Posts. It's pretty much always there, I can get it to behave a bit once I'm moving but that's really only between 20 and 40 mph and that's by hitting the sweet spots. I've been chasing this issue for a little while, the truck will start and die as soon as it turns over. It frequently stalls when shifting from park to drive. Find someone who. Now when its cold it runs really rough coughing and sputtering. The harness will work with almost any of the GM TBI ECMs that do not have the electronic shifting 4L60E or 4L80E transmission, however it will control the torque converter lock up when applicable for the 700R4 and 200R4 transmissions. It idles OKAY. So if your GM TBI engine has a very high idle, check your throttle body gasket. I've changed all the plugs,wires, rotor and distributor cap and a new fuel filter and still nothing. it idles rough and acts like its running really rich, then when you take it out to drive it, as soon as you step on it to put a load on, it cuts out and backfires. Has anybody solved the issue of the 2. This could be from the flooding that happened while we. Behind that reveals a torx screw. my question is will a combination of a toque converter out of a v6 700r4 stall be too low (1000-1100) a oem alternator from 3. I also don’t recommend a 454 TBI unit as they were designed to idle big block engine and often cause idle and light throttle fuel control issues on SBC so save yourself and me some headaches and get a bored SBC throttle body. Number 5 reads 95 +- 5. Today you can still net yourself a decent one for under $5,000, but chances are it needs some help. Producing up to 210 hp in factory spec, this engine can also be retrofitted into an older car with a performance carburetor to produce up to 250 hp. So I have a 95 TBI 350 with about 190K miles on it. - Compression stinks (60-70 out of 97), no significant change on wet test - Rough syncopated idle. Relationship between temperature and running OK, rough idle at start and missing which clears itself, all point to fuel air mix too rich. So I just. Jan 28, 2016 at 7:02 PM #1. July 4 Again, runs smooth at idle and even Revs smoothly but only when the truck is in park. Sounds like a demented drummer Here's what I have done - Carb completely cleaned, rebuilt, and all parts measured and in spec. While driving if you. This truck has a good motor but it lacks power all the time not like barely moves but it won't burn rubber. This was quite bothersome descending hills in low range/first. The truck has a NV3500 so the whole truck would surge. Re: extream high idle problem on 1990 chevy 1500, 4. I have to turn it over several times in order to get it to start than I have to feather the gas alot in order to keep it running after a few minutes it idles on its own really low idle. 93 Suburban 5. 1 of 2 Go to page. Even 150 to 155psi on wet compression test. TPS is new and and at. If you have the throttle just barely open it will smooth out until it upshifts then it does it again until the rpms build. A misfire may occur when your engine is idling, causing a rough or uneven idle. 3, 2012, Jenner, CA. For 1987 1/2 - 1995 Applications Need more power? This engine combination would be outstanding in your car, suburban, blazer, RV, van, truck, or 4X4 application. My chevy 1987 chevy Scottsdale with a 350 tbi sometime runs smooth then sometimes runs like its running with half the power or less like it has bad gas or something. chevy tbi 350, These vehicles featured a 350 ci, 5. Spark Plug Wires – While not every model and engine combination of vehicles today comes with spark plug wires (a lot are now coil on plug), if your F350 happens to have. Now when its cold it runs really rough coughing and sputtering. Jump to Latest Follow 1 - 20 of 21 Posts. Hello again. Hello!, Heres my problem. /260hp overheating issues. 95 350 Tbi does well idling in park and on the highway but at idle speeds it shudders. rough, chevrolet, 2500. 1 of 2 Go to page. Spraying starting fluid around the intake doesn't reveal any vaccum leaks. Both are roughly the same price and I think. It was fine, then rough idle, CEL, then shut off with no CEL. This kit is one of only two made for Jeeps that can be ordered California smog legal. Engine smooth at idle rough at acceleration Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › Engine smooth at idle rough at acceleration This topic contains 8 replies, has 2 voices, and was last updated by Matthew 7 years, 7 months ago. I’ve had a rough idle problem with the Chevy 350 engine in the van and haven’t been able to solve the problem for over a year now. Hi, I have a 2002 Launch SSV with an Indmar Assault 350 / 5. 7 Tahoe made a popping noise then it stopped after a few miles but it idles rough like its missing. EGR ports are clean, but I'm unsure how to check and make sure it seals closed. 88 RC 318 TBI rough idle and then dies FIXED 88 RC 318 TBI rough idle and then dies FIXED - Dodge Ram, Ramcharger, Cummins, Jeep, Durango, Power Wagon, Trailduster, all Mopar Truck & SUV Owners. memory serves, should be no more than 750. I bet that it is extremely dirty. It has an RV cam and high volume oil pump. Relationship between temperature and running OK, rough idle at start and missing which clears itself, all point to fuel air mix too rich. plus it labors when in gear. 88 Formula 5. The truck has a NV3500 so the whole truck would surge. Even 150 to 155psi on wet compression test. Insert a T-30 size Torx driver into the Idle adjustment screw that is located behind the plug removed earlier. I need help. My 1995 k1500 with a Tbi 350 will idle but when u try to give it gas in gear it acts like it's not getting enough fuel. Although it runs when cold started, the engine "hunts" in RPM and engaging the tranny (700r4) will occaisionally cause it to die. 3 4bbl idled rough, my '88 S10 Blazer with the 4.