To me, it sounds like a fuel starvation problem. My best educated guess would be to test the Fuel Injection Main Relay on the car make sure it's doing it's job. If I were you, I'd wire in a circuit breaker or fuse into one of the wires coming out of the relay to the fuel injectors. And when the fuse blows or you hear the circuit breaker click. Replace the fuse or wait for the circuit breaker to reset and replace the Fuel Injection Main Relay. Because from what I know, the Fuel Injectors are just some sort of relay that needs to be grounded. Hope that helps.. If you've got more electrical problems, send them my way..