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Prev Professional Automotive Repair Technical Discussions for September 13, 2006
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Open Help Requests for GM
Help Request Answers
1989 Buick Century 2.5L Misfire
hey guys im pulling my hair out on this one. int this buick quits firing on the #3 cylinder. the misfires comes and goes int. more noticable when hot. i have replaced coils , changed module, changed crank sensor, still have same problem. plugs and wires have a...
1997 Buick LeSabre Custom 3.8L Stall VIN: 1G4HP52K2V
This Lesabre stall more when cold. Will stall sitting at idle. Mainly stalls when you back ut of the shop and then put it into drive. Fuel pressure stayed at 40spi when last stall occured. Sounds like it is really sucking the air right before this happens. Noi...
2000 Buick Regal LS 3.8L Misfire, MIL Lamp on VIN: 2G4WB55K02
i've read all the posts pertaining to this miss fire code, but,,, p0300 ignition miss fire is cylinder number 4 only. client came from the gm dealer they installed new wires and plugs, did not cure the problem. now i have the car. miss fire data is literally o... Trouble codes: P0300 (miss fire code)
2000 Buick Century Custom 3.1L MIL Lamp on VIN: 2G4WS52J2Y
Thank you in advance for any ideas. I am getting a persistent egr low voltage code. I replaced the connector on the egr valve, as I could get the signal to disappear while wiggling the connector, and found a broken terminal inside. However, the problem has ret... Trouble codes: P0405
1982 Chevrolet Corvette 5.7L Mechanical VIN: 1CQAY0785C
Hello all, this corvette came to me from a body shop. The problem is the brake pedal goes to floor. This is a four wheel disc brake car. The current owner bought it wrecked in the front, with the frame work done. After doing some of the work the body was no...
1989 Chevrolet C1500 Cheyenne 5.7L Hesitation, Surge, Stall VIN: 2GTDC14K9K
Thanks in advance for any help or advice on this problem. When this truck came to me the check engine light was burning, black smoke was coming out of the tail pipe and it was hesiting. We put the scanner on the computer and found the map sensor not working at...
1995 Chevrolet Cavalier 2.2L Poor Idle Quality VIN: 3G1JC1246S
hello guys sorry no luck with the fiat sent it out. this cavalier runs good off idle but has a poor idle. its our companys used car. the fuel pressure is good and no egr is hanging up. plugs, wires arew good. the only code is ecm quad driver fault. replaced th...
1996 Chevrolet Blazer 4.3L speedometer VIN: 1GNCT18W7T
This vehicle has two intermittant problems that have not yet happened simultaneously (I don't think they are related). Problem #1: The speedometer needle will occasionally act like it is momentarily sticking. So far, only at highway speeds, the needle will no...
1997 Chevrolet K2500 Cheyenne 6.5L wait to start light VIN: 1GCGK24FVZ
97 Chevy K2500 wait to start light comes on, you start the truck and the light goes off, about 3 seconds later the wait to start light comes back on for about a second and goes back out. I scanned for codes and found none. Truck starts and runs good with no sm...
1999 Chevrolet Silverado 1500 5.3L remote door locks VIN: 1CGEK19T0X
Is it possible to reprogram a keyless remote from different year models of chevrolet trucks? I have 3 remotes and have been able to get only one reprogrammed to operate the locks. Don't know if the units are defective or if there is another way to program oth...
2000 Chevrolet Astro 4.3L srs VIN: 1GCDM19W6Y
Have a 2000 chev astro w/ srs air bag light on. Found codes b1000 sdm fault and b0024 drivers front deployment loop. Replaced clock spring and still hve same codes. Do not have drivers front air bag load test resister to confirm air bag. Has anyone seen sdm mo...
2000 Chevrolet Venture 3.4L MIL Lamp on VIN: 1GNDX03E6Y
Hi. I hope someone can help. I ran sec air pump thru scanner...pump runs...no change in O2 sensor readings. Turns out there is no power supply to the vacuum solenoid that controls the air pump check valves. Can anyone tell me where the power supply to the sole... Trouble codes: P0412 (Sec Air Inj Valve A Malf), P0418 (Sec Air Inj Relay A Malf)
2001 Chevrolet Monte Carlo SS 3.8L Security Light VIN: 2G1WX15K91
When the car is parked in Houston (100degF) heat all day and I start it the Security Light comes on solid. Every thing works perfect. After I drive for a while with the ac on and the interior cools down the Security Light starts to flash. Everything still work...
2001 Chevrolet Silverado 3500 LS 6.6L No Start VIN: 1GBJC34181
This Duramax diesel does not start for lack of fuel (6.6 liter) Scanner shows no codes present. Scanner reading for fuel pressure reads 1.0 MPa Always. There is a small fuel pump on left side of chassis between rear and front fuel tanks. If I feed it power, no...
2002 Chevrolet Silverado 2500 6.0L MIL Lamp on VIN: 1GCHK29U02
this truck resets this code intermitantly.have replaced rear sensor,ran new wires from pcm to sensor ,changed pcm and still has lower reading than bank 1 sensor 2. sometimes will take days to make light come back on. thank you for now Trouble codes: P0157 (b2b2)
2002 Chevrolet Tahoe LS 5.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GNEK13ZX2
This truck came to me from a local dealer. The MIL is on with a P0300 random missfire code. Scan data shows cylinder 3 to be missfiring badly and cylinder 1 occasionlly. Cylinder #1 seams to only miss when cold but #3 missfires almost all the time. I swapped t... Trouble codes: P0300 (Random Missfire)
1996 Geo Metro 1.0L headlights VIN: 2C1MR2266T
no headlights,high or low beam will come on when you pull and hold flash to pass? 12v at bulb connectors,don't seem to have grd. is there a relay or poss. combination switch? relays under hood ok, fuses all ok. bulbs new. any help apreciated. thanks
2000 GMC Jimmy Diamond Edition 4.3L Excessive Emissions, Poor Idle Quality, Surge, Misfire, MIL Lamp on VIN: 1GKDT13WXY
Hello all. This Jimmy is trying my patiance. It will start & idle normal for the first 2-3 min then B1 O2 heads towards it comfort zone of 3mv with no movement and ST fuel trim goes to 192. B2 is going a little lean to compensate ST FT 117. B1 is dumping fuel,... Trouble codes: P0171 (B1S1 lean), P0300 (multi missfire)
1994 Oldsmobile Cutlass Ciera 3.1L Hesitation VIN: 1G3AG55MXR
car runs good 90% of the time . some times when started check englight comes on then wont accelerate.the feeling is simmilar to a bad accelerator pump on a carb.the problem is when you cycle the key during testing the problem goes away for some times days or m... Trouble codes: 341 (cam sensor signal problem)
1999 Oldsmobile Aurora 4.0L Cuts out, Stall, Misfire, MIL Lamp on VIN: 1G3GR62C5X
hi everyone, had the car in several months ago for a miss. found to be cylinder #6. replaced the spark plugs and did a motor vac. the car ran fine. previous to us someone else had replaced the wires and we could see where one was burn on the valve cover at #6.... Trouble codes: P0300 (miss fire), P0603 (control module lt mem reset), P1599 (engine stall or near stall)
1999 Oldsmobile Intrigue GL 3.8L right side wheel VIN: 1G3WS52KXX
Thanks to everone in advance, this car on right hand turns has a metallic clicking noise from under the hood, sounds like cv joint but the noise is more metal on metal sounding. The noise only occurs when you turn to the right, going forwards or backwards, if ...
1999 Pontiac Grand Prix GTP 3.8L Oil Consumption VIN: 1G2WR121XX
Hope you all might be able to help with a problem with one of my personal cars. I purchased this car in July over the internet. We are a brake and suspension facility so this is somewhat out of my area. 99 Grand Prix GTP 3.8 Super Charged. The problem is it ha...
2002 Saturn Vue 3.0L MIL Lamp on VIN: 5GZCZ63B32
This Saturn was a drive by scanning with an appointment for next monday. I am writing because this is the first time I have encountered this engine and do not know a lot about it. The customer stated that about 1.5 years ago the pcv hose froze up and caused th... Trouble codes: P0507 (idle too high), P0171 (bank 1 lean), P0174 (bank 2 lean), P0300 (misfire), P0303 (cyl 3 misfire), P0304 (cyl4 misfire)

Fixes & Summaries for GM
Fix/Summary Answers
1992 Buick Park Avenue 3.8L Poor Idle Quality, MIL Lamp on VIN: 1G4CW53L1N
Thank you very,very much for the helpful replies that I recieved from the 12 members that took their valuable time to answer my help request. However, the customer never came back despite him wanting his car fixed and after several times we talked on the phone... Trouble codes: 43 (knock sensor est).
1995 Buick Park Avenue Ultra 3.8L lower intake gasket VIN: 1G4CU5216S
well I follewed my gut and everybodys advice and repaired w/silcone.I've never had a problem like this before but only w/this 3.8 v-6.I've always used silcone on end seals before even on the old small block chevys.one time a cork end seal bit me.on other 3.8 v...
2000 Buick Regal LS 3.8L electrical system VIN: 2G4WB52K1Y
I would like to thank everyone that replied to the help request, once I had a good electrical schematic of the ignition switch and could identify which wires should have power on them I used a headlight to verify that the circuits were carrying sufficient curr...
1982 Chevrolet K10 Custom 5.7L Steering/Suspension VIN: IGTEK14HXC
Thanks again for the 30 or so replys. Seems though even when the steering stabilizers look new, when removed and manually inspected, they were not providing enough dampening to the steering. Replaced w/new Skyjacker dual stabilizers. Death wobble is no more. T...
1994 Chevrolet K1500 5.7L heater core VIN: 2GCEK19K6R
updated and added grounds per multiple recommendations, replaced heater core (again), flushed the coolant. car has been gone long enough to anticipate that the problem is solved. Thanks so much for the help!!!
2000 Chevrolet Impala 3.4L Starting VIN: 2G1WF55E6Y
Great news! This Impala is running again. The car became very intermitent in when it would decide to act up so after fixing I wanted the customer to use it awhile before closing with the fix. It seemed that after wiggling the key and many cranks the problem wa...
2001 Chevrolet Astro LS 4.3L Mechanical VIN: 1GNDM19W71
Paul from Ontario hit it on the head. Replaced control arm bushings on both sides, noise is gone.
2001 Chevrolet Silverado 1500 5.3L shift patterns VIN: 1GCEK19TX1
Sorry for the late reply and close to this one. As it turns out Anthony from Colorado hit this one on the head, The transfer case control module did the trick, evidently this is really a common problem, as far as the trouble code CO362 Edward from South Caroli...
2002 Chevrolet Malibu 3.1L Poor Fuel Economy, low power VIN: 1G1ND52512
Hi to all and thanks for the info. Paul, Nicklaus, Robert, Wayne, and Jason were right on the money with a plugged cat converter. Was going to check back pressure by taking out the front o2 sensor. Started car just to check quick and the car came alive. Checke...
1992 Pontiac Bonneville SE 3.8L No Start VIN: 1G2HX53L12
Well thanks for all the replies, Turned out to be that after we broke the starter, we ordered a new starter and crank pulley, we figured pulley might be slipping and making the tdc marks off. Well the the new balancer was wrong, the sheilds on the back of the ...
2002 Pontiac Grand Prix SE 3.8L Hesitation, spark knock VIN: IG2WP52K42
thanks for all the help found that at idle backpressure on cat was about 1 psi and 3500rpm when to 5 psi replace cat vehical was still misfireing on #3 and now #6 replace plugs with oems still had misfire good friend cam over from gm dealer and we tested the f...
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