2002 5.4 Expy. Truck will not start when warm after short shut off periods, 10-30 mins, letting it sit will eventually allow it to start. Runs fine otherwise. It’s the dead of winter here so single digit temps or worse. We replaced the battery a couple of weeks ago and the problem vanished only showing up again tonight.

 

Insufficient data.

Define "no start", ie, no crank, cranks but does not start, etc.....

If no crank, what is the indicated status of the PATS system?

Steve

 

Cranks just fine.

 

Do you hear the fuel pump when you turn the key? My old 92 did this and it turned out the pump was bad.