1997 Chevrolet Malibu Q&A

1997 Chevrolet Malibu Question: My 1997 Malibu runs for 15 or 20 minutes, then stalls. Restarts after 15 minutes

I have had the codes checked and the the crankshaft sensor does not show as a problem. What else can I try? The car does not indicate that it is running hot and the temperature gauge is in the normal operating range, however I did notice that the cooling fans do not seem to come on, I have checked all the fuses and they look to be okay. This has happened on and off for a year. The theft light sometimes comes on, but not all the time when the car does this. Could my key chain be too heavy? -
Answer 1
Sounds like a relearn, but is the security light on while you wait for restart? Probably needs a scantool hooked up scanning data when it stalls to verify shutdown problem, and maybe a fuel pressure gauge to verify fuel pump operation. It's hard to find some malfunctions when things are running fine. If a Tech2 scanner is used it could show history data or passed & failed data. Code readers will not retrieve hidden codes. Hope this helps. -
Comment 1
Thanks for your reply. In answer to your question about the security light, it had come on once or twice, but not the last several times, while I waited for restart. If it is a relearn issue, is that something the dealer would have to do or can a person with intermediate skills perform this task? I had the engine rebuilt almost a year ago, but I did not start having this problem until after about 6,000 miles after rebuild. -
Comment 2
A professional shop should have the ability to diagnose this problem. The thing tat sticks out as I re-read this is your fuel filter may be a big issue which will cause the fuel pump problems. -
Comment 3
Thank you for your advice. I have since replaced the fuel filter and the camshaft sensor, but the problem persists. Before the car stalls I get a warning chime, but no check engine light or theft light system light comes on. I'm at the end of my rope. I had this engine rebuilt 3,500 miles ago and was very costly, I need some help I'm on a fixed income and I need my vehicle for doctor's appointments. Please help. -