There's probably a piece of old spark plug wire boot stuck down by the spark plug. You might fish that out with a pick or long flat-blade screwdriver.
A common cause of a crank / no-start is the crankshaft position sensor or camshaft position sensor. Both of them often fail by becoming heat-sensitive, then they work again after they cool down for about an hour. Start by reading and recording the diagnostic fault codes. If there is no code set, you'll need a scanner to view live data to see if one of those signals drops out just before the engine stalls.
When you have an engine-related problem, you need to list which engine you have.
Monday, April 6th, 2015 AT 5:29 PM