89'volvo, car starts rough but after running for 5-8 min it stalls out and won't restart. i have replaced the internal fuel pump and fuel pump filter. could it be a fuel relay switch or

just because it restarts an hour later doesnt mean it has spark when car initially dies sometimes when this symptom occurs the coil or igniter is over heated and loses contacts and signals internally when they cool down sometimes they will work again for a short time there are also other ignition related parts that can cause this symptom such as ignition modules cam sensors crank sensors hall effect switches in distributer etc. just because it restarts an hour later doesnt mean it has spark when car initially dies sometimes when this symptom occurs the coil or igniter is over heated and loses contacts and signals internally when they cool down sometimes they will work again for a short time there are also other ignition related parts that can cause this symptom such as ignition modules cam sensors crank sensors hall effect switches in distributer etc.

I have checked all that is listed replace fuel pump fill fuel pump in line and in tank crankshaft sensor relay switch car still doing the same thing starts for a few minutes then stop the coil pack that's done still doing the same thing anybody has anybody found a way to alleviate this problem I have checked all that is listed replace fuel pump fill fuel pump in line and in tank crankshaft sensor relay switch car still doing the same thing starts for a few minutes then stop the coil pack that's done still doing the same thing anybody has anybody found a way to alleviate this problem