I have been having problems with my car, basically the car after you drive it for about 15 or 20 minutes and you turn it off and try to start it again does not start and the engine vibrates a lot. i been changing parts like gear cams,cramshaft sensor ,timing chain and still the same ...any idea what this could be ? (when cold car start and drives normal).

 

Before you try to start your engine, pull out one plug and check if its not wet.