when i was a kid the old mans car would run OK and when we would go to the park for a picnic on sundays the car would always stop about half way there... sit in car for about an hour and then it would start right up like nothing happened.... found out many years later on his other car that the spark plugs were so fouled up that when the car was warmed up it was like glow plugs, always lit up so the firing was off..... he never did nelieve in working on a car until it stopped.... since i started driving i bought just about every book on cars that i could learn from.. never had that problem myself... once it gives me a little trouble i fix the problem....