Why wont my 91 f150 start when engine temp is up to nornal?
We have a 91 f150 4x4. runs great, starts right up when engine temp is cold but after driving it or letting it run and get up to normal temp, turn it off and it will not start again till engine is cooled off. Replaced a bunch of sensors including the ECT sensor, sounds better but still will not start if engine in warm or hot. what could this be?