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Prev Professional Automotive Repair Technical Discussions for August 7, 2014
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Open Help Requests for GM
Help Request Answers
1996 Chevrolet K2500 Cheyenne 5.7L No Start, Stall VIN: 1GCGK24R4T
truck had engine replace and ran before now just fires for 1or 2 sec and stalles if i unplug the main power for computer it starts but once i shut it off it wont restart unless i unplug computer agian fuel pressure and spark is good can someone help please
2003 GMC Sierra 2500 HD SLE 6.6L Excessive Emissions, No Start VIN: 1GTHK29153
Hi, folks. This diesel has a long crank, and intermittent no start hot. It also shows a lot of black smoke on hard accel, and has a smoke "haze" even at idle speed. The inside of the tailpipe is heavily sooted.It has a slight diesel knock, too. No codes. Tech...
2004 Pontiac Grand Am GT 3.4L valve train VIN: 1G2NW12E14
Customer drove in. Wanted tune up. Heard abnormal noise when I revved motor. Did diagnostic scan and found P0300 misfire detected. Looked at misfire history and noticed that cylinder #2 was incrementing and causing catalyst overheating. Performed leak test (pa...
2001 Saturn L300 3.0L Misfire VIN: 1G8JW52R61
Car came in with intermittent random misfire. Computer was reprogrammed in past for random misfires by dealer according to tsb. Replaced plugs, coils, and valve cover gaskets. Vacuum at idle is 20in.. Vacuum in drive with ac on is 15in.. Checked for vacuum lea... Trouble codes: P0300, P0301, P0302, P0303, P0305, P0306

Fixes & Summaries for GM
Fix/Summary Answers
1993 GMC C1500 Sierra 4.3L Poor Idle Quality VIN: 1GTEC14Z4P
thanks for the input all of you! Stan was correct, my fuel pressure gauge was inaccurate! using a different gauge here in the shop i found 10 psi KOEO. i tried blocking EGR, unplugging O2 sensor, unplugging spout connector blocking off brake booster, remove...
2004 Pontiac Bonneville GXP 4.6L temp. gauge VIN: 1G2HZ54YX4
sorry for taking so long to close. I did the gauge sweep test about 50 times and it never missed a beat. I replaced the temp. sensor with no change. One thing that really bothered me was when I unplugged the temp. sensor the gauge still worked. For that reason...
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