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Prev Professional Automotive Repair Technical Discussions for October 23, 2010
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Open Help Requests for GM
Help Request Answers
1991 Chevrolet Corsica LT 3.1L injector
Engine died while driving.Hot spark,no injector pulse.good fuel pressure.A breathalizer was installed four days earlier.Breathalyzer installer says only disconnects starter.I completly removed breathalyzer and tested wire taps and no wires are cut and no groun...
2004 Saturn Ion Red Line 2.0L ignition VIN: 1G8AY12P74
I was installing a remote start into the car and splice and taping the wires. Everything was good car remote started fine started with the key fine. Then as I was screwing the bcm back into its location under the hvac controls I heard what sounded like 12v wir...

Fixes & Summaries for GM
Fix/Summary Answers
2001 GMC Savana 1500 5.7L Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1GTFG15R9Y
Thanks all for your valid ideas!! Turned out it was a combination of Leaking lower intake manifold and crappy cap and rotor... Now with new OE cap and rotor hardly notice the van running, except for the rattle cat... were gonna fix that next. Thanks again fo... Trouble codes: P0300 (Acutaully cylinders 7a nd 3 are missing).
2003 GMC Yukon Denali 6.0L Misfire VIN: 1GKEK63U03
Problem was the cat , removed the cat looked in both ends looked good cut the cat case in the middle and the material around the ceramic had failed in between the two pieces of cat material there was some minor melting of the rear piece so it will get 2 new o2... Trouble codes: P0300.
1994 Pontiac Firebird Trans Am 5.7L No Start VIN: 2G2FV22P6R
Thank you everyone for all your help on this one. Finally figured it out. Update to what was done. first all compression readings were good 130 across the board, firing order was correct(spec), all parts were OEM replacements. Turns out the last knuckle h...
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