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Prev Professional Automotive Repair Technical Discussions for October 8, 2012
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Open Help Requests for GM
Help Request Answers
1967 Chevrolet Camaro 5.3L Hesitation, Stall
Hello I have a project car Im working on for a customer. We rebuilt the motor and transmission and install the fuel injection system off of a 1995 suburban with a 5.7liter and 4l60e trans. Car idles good and cruises well. The problem is that when you accel mod...
1997 Chevrolet S10 LS 4.3L engine VIN: 1GCCS19X1V
We took the engine out for rebuild and it was not as simple as it should have been. My question is about the replacement procedure. We are thinking that we need to remove the automatic transmission and install it on the rebuilt engine and put the whole assembl...
2001 Chevrolet Venture LS 3.4L Misfire VIN: 1GNDX13E31
Car runs rough on a cold start for about 15 seconds and then it will run smooth. Car runs fine on a flat surface but as soon as you start going up a slope (25 deg.), it sill start loosing power, if I will step harder on the accelerator pedal, the Check engine ... Trouble codes: P0300 (Random misfire)
2003 Chevrolet Malibu LS 3.1L Hesitation, Surge, Misfire VIN: 1G1NE52J23
engine has stumble/misfire just off idle when you give it gas. had egr performance code, egr position and desired voltage was off by 3/4 of a volt so replaced it with ac delco unit. stumble was still there customer took for the weekend, brought it back today a... Trouble codes: P0404 (EGR Performance)
2002 Oldsmobile Alero GL 3.4L engine VIN: 1G3NL52E22
We have a 2003 Olds Alero with the 3400 series engine. Customer states that approx. 1 month ago the check engine light came on and it was code P0301. Customer changed plugs, wires and replaced the coil for cylinder 1. Car seemed to run okay but problems at idl...

Fixes & Summaries for GM
Fix/Summary Answers
1994 Buick Century Special 2.2L suspension VIN: 1G4AG5540R
Well after removing the belt the vibration was still present. Tried putting it in neutral going down the highway and it did not change much. Went ahead and swapper out the first torque dampner as it had already pulled the rubber from the steel bushing. This li...
2003 Buick Century Custom 3.1L Misfire VIN: 2G4WS52J63
After testing engine compression several different was, including with a pressure transducer, I bought a leak down tester and found #3 cylinder leaking down 40%. Removed valve cover and loosened rocker arms and leak went away. Removed intake and lifters and ... Trouble codes: P0300 (Misfire detected).
2004 Cadillac Escalade EXT 6.0L Power Loss VIN: 3GYEK62N44
Well some really great ideas from all of you guy that love to stay sharp... Timonthy that was some really great stuff i kinda overlooked that but i have seen many car in the past with a few ohms and work great but some system can't handle it.. Well in all i ca... Trouble codes: P1516 (Throttle Actuator Control TAC- Position Performance), P2108 (TAC Module Performance), U0107 (Lost Communications with TAC Module).
1996 Chevrolet K1500 Cheyenne 5.7L power steering VIN: 2GCEK19R1T
Thank you to all who replied and offered support. It appears the fix was a BRAND NEW pump for a 99 chev truck. The pumps are identical and was a direct replacement. Installed the new pump and the truck steered like new. The post on the contamination issues may...
2006 Chevrolet Cobalt SS 2.4L MIL Lamp on VIN: 1G1AM58B26
Well it's finally done!! Hurray. Re-flashed the PCM to recognize the new TB and all is well. I tried the idle reset procedure that was described in one of the posts but after 25 miles it did absolutely nothing to fix. Resetting fuel trim had no effect eithe... Trouble codes: P0121 (TPS Sensor), P0507 (Idle Too High).
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