Starts fine, then after warm-up when engines are shutoff, engine won't start. I have replaced the battery, starter, alternator and voltage regulator. Still doing the same thing. Gets hot and won't start. Could it be the coil???? Please help.....

 

Worked on car for years and never had to replace a simple coil. Don't know what year vehicle you have, even so this would be a hard to T/S thing. Check ground wires from battery, maybe fuel pump (check pressure) or igntion module, cam sensor, or crank sensor (check for spark) good luck

 

Gas or diesel?