I am at my wit ends. Need help. Car starts in the morning. No problems. However, after I have driven for a while and turn off the engine, it will not start. It will crank but will not start. No check engine light. Replaced Fuel pump relay. Ihave notice that when i first start the car I hear the fuel pump engage. but once the engine is hot and I try to start it I do not hear the pump engage. Is the fuel pump on its last leg or is it something else.