1991 Pontiac Grand Am Engines dies while driving

SC58

MEMBER
1991 PONTIAC GRAND AM

Engine Performance problem
1991 Pontiac Grand Am 6 cyl Front Wheel Drive Automatic

My son has a 91 Pontiac Grand Am with a 3800 V6, Here is what it has been doing, I went to the store shut the car off and it wouldn't startup. I used starting fluid to get it running stopped to get gas did the same thing. Starting fluid didn't work. After sitting it cranked and ran fine for 2 days. It quit again on my son after driving some 20 miles from school. Same thing again sat for awhile drove another 20 miles home carried tto a mechanic could fix it because it would qiut again. Thate has been a couple of times it has quit and started back up after a short time. Yesterday it did it died twice andcranked back up. I repalced a line going to the vapor canister after thet itwould turn over but not run it sat for over 3 hours and cranked up no problems. I have replaced the ingnition moduel it still did it and the fuel filter today.I notice that the rpms flucaite when it idlesand after warm up it will drop to 800 rpms. It will suddenly sugre to about 1000rpms and drop down to 500 rpms. Any help is appreciated.

2 Replies

MMPRINCE4000

MECHANIC
8,549 POSTS

Check the fuel pressure with a mechanical gauge and see what you are getting, should be above 40psi.

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Saturday, July 26th, 2008 AT 6:29 AM

88GRDAM

MEMBER
1 POST

If the engine will turn over but quits when you put the car in gear, it may be the TCC Solenoid (Torque Converter Clutch Solenoid). Symptoms of a bad TCC solenoid (AKS: the Lock-up solenoid) is when your car always stalls when you slow down to stop. This is an easy repair that is often overlooked by mechanics and have placed many good cars in the Junkyard.