Here is the latest issue with the truck. It starts fine in the morning 5AM but after i get off work at 2PM the truck has to crank for a good 5 or 6 seconds before it will start and when it does it stumbles quite a bit until it gets itself together and starts running normal (another 5 seconds or so). After that it will start without this issue. Not sure if the outside temperature is a factor but its Las Vegas and its been around the 100 degree mark and the truck is black so i know its cooking under the hood.

Ideas?

Thanks

 

Certainly heat related. Does it feel like the engine is "running on fumes" for those 5 seconds before it begins nor,al operation?

 

Crank no start - could be your battery (temp related) or its connections.

 

I doubt this is heat related. Before our year trucks ('04 to '08), Ford changed to a single feed fuel line, and eliminated the fuel pressure regulator valve. This new single fuel line helps prevent vapor lock and fuel "boil".
The fuel injection rails have a fuel pressure sensor, which informs the PCM/ECU to cut off power to the fuel pump via the FPDM (fuel pump driver module) located by the spare tire. This module "turns on/turns off" the fuel pump in the gas tank to regulate pressure in this single line.
With the older fuel delivery systems, there were two fuel lines: a send and return line. Fuel was pumped back into the gas tank with by control of a fuel pressure regulator via the return line; this was problematic in the way of fuel vaporizing due to heat. It was eliminated with the new system.

 

Darn, this is where I was going. Ruin all my fun.

 

I would say yes to the running on fumes, very much sounds like it's starved for fuel. As far as cranking it does start , just takes a bit to get it to start. Battery is new it turns the engine over just fine. This only happens when it sits outside in the sun all day.

Thanks

 

I bet you a cup of java that your warm start issue is due to on its way out but not totally dead crank shaft position sensor.

My second guess would be leaked injectors.

 

I was under the impression that the crank shaft position sensor was one of those items that didn't go bad that often.

Thanks

 

It's rare but it's there.