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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for July 18, 2004
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Open Help Requests for GM
Help Request Answers
1991 Chevrolet Blazer Silverado 5.7L MIL Lamp on VIN: 1GNEV18K2M
hello out there-was hoping to get some help on this problem we have-we installed an engine in this vehicle and after you drive for about 10 miles especially up a hill the check engine lite will come and have a est circuit fault-the vehicle immediatly looses po... Trouble codes: 42 (est circuit fault)
1992 Chevrolet S10 4.3L No Start
Truck came in with fuel pressure dropping off to about 20 psi when trying to start I changed the pump and a small section of line. Fuel pressure now remains steady over 50 lbs Still no start condition remained I checked injector signal which is present while c...

Fixes & Summaries for GM
Fix/Summary Answers
1989 Chevrolet Cavalier Z24 2.8L Poor Idle Quality, Hesitation, Misfire VIN: 1G1JF11W6K
thanks for all the help. However the cost of repairs so far exceeded the value of the car so they aren't going to fix it. Thanks for all the help. Trouble codes: 42 (est).
1998 Chevrolet Blazer 4.3L Alternator VIN: 1GNCS13WXW
Thanks for all who offered assistance and information. The major consensus by replies was that this vehicle will require a quality alternator, which most standard store alternators, will not suffice. As we found out ourselves. We were not given the time or o...
2000 GMC Sierra 1500 SL 4.8L Misfire VIN: 2GTEK19V9Y
Hello and thanks for the sugestions. The cat on the left side was plugged. Not sure why or what happened first though. (Chicken or egg?) I will check the injector circuits after I fix the exhaust. (there was some missfire on no 1 as well but 3, 5, and 7 were w... Trouble codes: P0300 (Random Missfire), P0305 (Cylinder 5 Missfire), P0307 (Cylinder 7 Missfire).
1989 Pontiac Grand Prix LE 3.1L radio VIN: 1G2WK14TXK
thanks for the info after actually finding the radio attach a temp ground wire to it and no whine. Installed a good ground wire and it is up and running again thank you all.. Joe
1993 Pontiac Bonneville SE 3.8L No Start VIN: 1G24252L4P
The car is still not fixed! BUT it will be done! Here is what I know factually: NO injector control signal, all other inputs are good. I have power at the injectors. Good fuel control signal to pcm from icm(purple/ white wire). Good crank siganl to icm, did no...
1994 Saturn SL2 1.9L Transmission VIN: 1G8ZJ557OR
Hello everyone and thanks for the help on this one. We removed the upper shifter housing and found two of the shift forks caught partially engaged. We were unable to find any problems with the the shifter cables so we were convinced there was just enough wear ...
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