1990 Oldsmobile Cutlass 6 cyl Front Wheel Drive Automatic 187000 miles
The engine will start normally, and run for some random amount of time, then just quit - no stumbling, chugging, bucking, or anything else. Just running normally, then quits as if the key was turned off. I could usually restart it and go on my way, but sometimes it would only run for 2 secs, then quit again. I could let it sit for 5-10 minutes, and it would run normally.
Thought the fuel pump was quitting, so replaced the fuel pump relay - problem still there. Plumbed a fuel pressure gage into the fuel rail on engine, ty-rap'd the gage to the windshield wiper to observe fuel pressure. Normal running pressure was ~37 PSI. Was watching the gage when it quit the next time, and fuel pressure was still ~37 PSI, so I assume that fuel system is good.
I replaced the coil driver module (the plate under the coils, that the 3 coils plug into) after the auto parts testing machine indicated it needed to be replaced. Problem still there.
Replaced the crank sensor - problem still there.
Replaced the computer module with one from the auto parts store, transfered the cal-pak from the old computer to the new one - problem is still there.
I'm looking for ideas to try next.
have the same problem?
Wednesday, June 25th, 2008 AT 9:49 PM