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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for August 7, 2004
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Open Help Requests for GM
Help Request Answers
1991 Buick Skylark 3.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G4NV54N3M
Ok..This car came in with customer saying sometimes it backfired a lot while at idle...Code 42 is current. Electronic Spark Timing... Now I have had some work with the 3.8 in this area so I am thinking its a similar setup... It must have a bad connection..in t... Trouble codes: 42 (EST Circuit Error)
2001 Chevrolet Silverado 1500 4.3L Misfire VIN: 2GCEC19W61
Came in running bad on a wrecker. Found code P0300 Cap was corrided changed cap, rotor, wires, plugs, and fuel filter. Still had a misfire, on cylinders 1,3,5. All on the same bank. Changed the o2 sensor, still missing. Tried a distbutor and still missing. See... Trouble codes: 0300 (ramdon cyl. misfire)
1994 GMC Sonoma SLE 4.3L Surge VIN: 1GTCS19W3R
Hi all. I have inhehearted a problem child from another shop. They have installed a rebiult motor, the engine oil cooler lines let go, destroying the original motor. Cust states that since the motor was installed, it has been a complete dog, no power whatsoeve...
1990 Pontiac Grand Prix LE 3.1L Poor Idle Quality, Cuts out, Stall VIN: 1G2WJ14T8L
hi teem customer brought this in after working on it trying to save a shop bill he replaced the ecm with wrecking yard part he tells me he tried two different ones the last one came off one that was still running car stll has same symtons. i scanned it and fo... Trouble codes: 22 (tps)

Fixes & Summaries for GM
Fix/Summary Answers
1995 Buick Century Special 3.1L Hesitation, Surge, Cuts out, MIL Lamp on VIN: 1G4AG55M9S
Did not get much help on this one. It was not the EGR Valve solenoids...I believe the problem lies in the trans control. 2nd gear solenoid has low resistance...14ohms...although I did not get the chance to repair the vehicle I do believe that is where the prob... Trouble codes: 341 (Intermittent Cam Signal), 755 (f31 trans sol b error), 740 (tcc error), 1650 (Quad driver B error).
1995 Chevrolet C1500 Cheyenne 5.7L power door locks VIN: 1GCEC14K5S
Hello all. finaly got this truck out of here. actualy i feel kinda stupid after all. the problem turned out to be of course in the RH door wiring harness. since this truck been to body shop for a door replacement ,the body shop replaced a 95 c/k RH door with a...
1995 Chevrolet Blazer 4.3L fuel/spark VIN: 1GND145WL8
Thanks to everyone's help on this one. It drove me crazy but it turned out to be the wire that was connected to the alarm system which was installed not too long ago and it happened to be going to the ignition wire. Thanks to everyone who told me to check the ...
1999 Chevrolet Tahoe LS 5.7L 1-2 & 2-3 shift VIN: 1GNEK13R1X
hello all. 16 replys in all. talked to owner of truck and gave options from shift kits to dealer valve body. owner decided to trade in truck. thanks to all who replied. this was my first time requesting help and the response was great .this is a great source o...
2001 Chevrolet S10 4.3L Hesitation, Surge, Cuts out, Stall, Misfire, MIL Lamp on VIN: 1GCDT19WX1
Thanks to all who replied. Even though we had swapped the MAF,during troubleshooting, with a supposedly known good one from another vehicle, the truck was still suffering the same symptoms. After several test drives the symptoms were caught on a snapshot on th... Trouble codes: P0171 (fuel trim system rich bank 1), P0174 (P0122- TPS circuit low voltage), P0122 (TPS circuit low voltage).
1992 Pontiac Grand Prix SE 3.1L No Start, Hesitation, Cuts out, Stall, rotten egg smell VIN: 1124466T2P
to scott from wisconsin it was not the o2 sensor to gorge from ontaro it not the ing it hold pres dale from colordo was close it had a bad ground the status of the fix is the customor sold the car thank you to all__michael [...]
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