New answers tagged diesel
Probably an engine temperature sensor. I had a similar issue with a '89 VW Fox. Cold temp would start fine and the moment it got warm.....died. Wait 10 minutes good to go until it got warm. Good thing I had a service manual in the car and a calculator. I was near a Radio Shack and picked up 2 thermistors put them together plugged them in and tie wrapped ...
More than likely you have injector(s) leaking down when hot. If not that it can be a fuel pump or fuel pump pressure control, newer diesels can be complicated to diagnose here due to computer controls.
Check the start relay. I've seen other f-series owners complaining about this exact issue on this forum.
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