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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for November 15, 2009
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Open Help Requests for GM
Help Request Answers
1992 Buick Century Custom 3.3L Excessive Emissions VIN: 1G4AH54N9N
hi evry one!i need help with this car, came in failing emission inspection for NOx at 15 mph ,reading 918 ppm . 25 mph 687 ppm. car runs good , no codes , from emission reading looks like its running lean , but with my snop on scanner o2 sensor switching withi...
1999 Chevrolet Blazer 4.3L Poor Idle Quality, Poor Fuel Economy
i have a slight ruff idle and very hard on fuel.on accel the engine is smooth,no hesitation,smooth take off but hard on fuel.i have replaced the upper and lower intake gasket but i had this prob before.i adjusted the can retard to 0 degrees.all tune up items a...
1994 Pontiac Sunbird LE 2.0L Cuts out, Stall, Misfire VIN: 1G2JB54H2R
94 sunbird after running for 10 min will stumble if accel hard. driving down the road bogs out and will stall. had test parts and tried as last resort. replaced ecm tps map and egr valve no change ran on injector clean bottle and fresh fuel no change. scan too...

Fixes & Summaries for GM
Fix/Summary Answers
1997 Chevrolet S10 4.3L Cuts out VIN: 1GCDT19X5V
Thanks to the many people that have shared their expertise, the fuel pump was indeed weak and causing the problem, put a new fuel pump in, pressure stayed above 60psi, ran great, thanks again to all those who helped, Brian.
1999 Chevrolet C3500 6.5L Bosch Hydro-Boost brake assembly VIN: 1GBJC34F6X
well thank to all who sent a diagram. i also found a tech site that told me to seperate the houseing and i didn't need to remove the whole unit from the truck i only need to replace a few seals and i did just that , replaced the piston seal, dump valve, and t...
1995 Geo Prizm LSi 1.6L Hesitation, Stall VIN: 1Y1SK5264S
Thank you to all that replied the vehicle fix was replacing the spark plugs, and making sure the kv voltage was adequate under throttle opening. Finished it up with wire set and cap and rotor.
1996 Oldsmobile 88 Royale LS 3.8L lifter noise VIN: 1G3HN52K1T
Well, this one is fixed.I want to thank everyone that offered assistance. The replies were very helpful, but a silver bullet did not exist. I did learn something on this one. Upon disassembly I found a roller broken on #5 exhaust lifter. This part rides on the...
2001 Pontiac Montana 3.4L Cooling Systems VIN: 1GMDU03E61
Thanks for everybody that offered help. The Van is now fixed. First off I still stand behind what I said about it not being the intake gasket. The coolant passage and the intake passage ports are separated by about 1/2 where the gasket is, therefore I belie...
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