I have a 1989 mustang gt 5.0. When the car is cold it fires right up. While still cold you can cut the engine off with the key n it will start back no problem. When it gets warm if you kill the key switch n try to start it all it will do is crank. Getting fuel pressure and spark just won't fire. But if you dump the clutch to kill the engine without turning off the key switch it will start right back up no problem. Im so confused can someone plz help. I have replaced the distributor, tfi module, etc and cleaned the mass air. It only does it if you reset the key switch while warm