Soo when i start the car i have to revv it and keep revving it past 3000rpm just to get it to stay on. If i stop at a light the car will try to die so i have to put it in neutral and rev it more until the light turns green. The car had a cel light on before but when i cleaned the throttle body it turned lff. It was pushing P1250 code. That's for the fuel pressure regulator. Still dont know whats wrong. Please help