I need help! My car will start fine if it has been sitting, it will not restart. It will crank but no start, sometimes if i hold pedal to the floor it will start and then idle down and die. I can drive it when started but on take off it will most time hesitate and want to die, ive changed crankshaft position sensor, a coil pack, map sensor, and fuel pump is gettin good pressure..i need help please!!