Engine Performance problem
1995 Oldsmobile Cutlass 6 cyl Front Wheel Drive Automatic 186000 miles
Hi, I have a 1995 Olds Cutlass Supreme, 186000 miles, A/C and 4 speed automatic. The problem is the car dies at normal operating temperature and does not like to start back up. It appears to me as a fuel deliver issue and also intermittent as it tries to pop off and then dies instantly. But every once in a while it will start up, run for 30 seconds and die. If you leave it sit for 20 minutes it will run again until it gets back to its normal operating temp and then starts dying again. The plugs are new gaped at.060. There is no check engine light on, no vacuum leaks and it does have the exhaust donut out pre catatlytic converter. In cold engine condition with my fuel pressure gauge on the shrader valve and key on engine off I get 43 psi and it drops to 37 psi when the fuel pump stops priming. Running cold is 37 psi. When it gets to normal temp and dies, the fuel pump primes to 36 psi with key on engine off and drops to 30psi. It runs rough at 30 psi and applying 10 psi of vacuum to the fuel pressure regulator does not help issue. It does however seem to run a lot smoother and near its normal fuel pressure with the vacuum hose removed from regulator. Is this a fuel pump issue? I should note that the fuel injectors are opening and closing all the way till the engine stalls. I can hear them with my stethascope/long skinny screw driver.
Wednesday, June 3rd, 2009 AT 11:25 AM