I have a 2007 Ford F-150 xlt with the 5.4 v8! I am having trouble getting it to start in the mornings when there is dew on the ground and cooler temperatures but then in the afternoon usually around 12 to 1 when the temperatures are warmer it starts right up within the first two cranks so I'm trying to figure out why it does that? I've changed the cam sensors and I've also bought a crank sensor but haven't had the chance to put it on yet so is there anything that I'm overlooking or that I can do before I have to take it to a dealer and let them look at it because I really don't feel like spending that kind of money for something I can do myself! I talked to my buddy the other night and he had mentioned some type of temperature sensor but was it ordering if that's what was causing it!?

 

Has the FPDM been inspected or replaced? If it is corroded or open to atmosphere it may be wet in the morning.

 

Yes I have recently replaced my fuel pump, fuel pressure regulator, filter, cam sensor, and fpdm about 3-5 months ago! I have a warranty on the fpdm do you think it's possibly bad?

 

Not cracked or corroded - not likely the issue.

 

Ok I will have to check if not that then what could be other options?

 

I had an issue like that with my 02 Expedition, changed my spark plug wires and it solved the issue. The wires had broken down (old) and the dew on the wires would divert the spark to the engine block.

 

Ok I will have to check the wires because I have recently replaced the spark plugs!!

 

So I don't knownif it's the drive box module because I heard the fuel pump engage! Would it still possibly be that or is it something different now?