Help! My car starts when cold and idles well. All hoses have been replaced and there are no brittle or broken electrical wires. Here's the problem, I will drive to the store and when I get back, the engine starts and shuts down. In order to get it started again, I have to hold the gas pedal down while cranking the engine for like a minute or two. Sometimes it won't start at all and I have to leave it to sit until the car cools down. This only happens when the engine is hot from driving, not hot from idling. It has a new fuel pump, injectors and the pressure is right at 30r.p.m. No leaking vacuum hoses either. Any ideas?