Engine Performance problem
1991 Buick Century 6 cyl Front Wheel Drive Automatic 110000 miles
I am a diesel mechanic, having a tough time figuring this one out. The problem started a couple of months ago, car would die intermitantly after being driven for awhile on hot days. It would always restart and make it home. Now the car will start and idle fine, first thing in the morning, and die after runing for a couple of minutes. Pressing the throttle will usually kill the engine immediately. Once it has died, it will not restart until the engine completely cools down (engine never does "overheat" when running).
Tested the ignition control module-bad; replaced. Replaced spark plugs. Checked injector harnesses with noid light-all looked good. Replace fuel filter. Fuel pressure is steady at 45psi. Checked TPS passed all tests listed in All Data. Removed and cleaned IAC. Removed and cleaned mass air flow sensor. Checked spark when engine won't start-each wire throws a bright blue spark about 1'' long.
When the engine does start in the morning it idles very smooth for the very short time it does run.
I look forward to any reply
have the same problem?
Sunday, August 22nd, 2010 AT 2:01 PM