Engine Mechanical problem
1994 Buick Regal 6 cyl Front Wheel Drive Automatic 136000 miles
I have been dealing with this issue for the past few months and have taken it to two different mechanics without any resolution.
The ignition coils, spark plugs, ignition control module, fuel filter and fuel pump have been replaced without fixing the problem.
After what seems to be a random issue of stalling, I have been able to narrow it down to a predictable pattern.
After starting the car from a long sit (overnight or after 2 or more hours), it will run for about 15 minutes until it stalls. I have to let it sit for 2 to 5 minutes before its able to turnover.
The correlation of what leads and then follows the stalling: the reading on the oil pressure gauge. Upon first start, the oil pressure is high during idle, above 40 in the 50-60 range. It remains in that range during driving and idle. Then, after the approximate time of 15 minutes, the engine stalls. No stuttering, no chugging, just. Off.
When I finally get it to turn over, the oil pressure gauge reads in the 20 range during idle and a little over 40 during driving. The car does not stall again for the remainder of the drive.
From what I understand, the oil pressure should be higher than usual during first start up but then lowers to normal range after warm up.
Could the stalling issue be tied to the oil pressure switch?
have the same problem?
Friday, November 6th, 2009 AT 10:02 PM