Hi, I have a '76 280Z and I have this problem. I will drive along for a bit and the car will all of the sudden stop accelerating. I replaced the fuel filter and it kept happening. So then, I replaced the fuel pump. When I put the pump in the car ran fine for about 20 minutes then it stopped. Then engine turns over but won't start. Someone said that it could be the brain box and that when it gets hot that it is shutting off. Please help me.