Starts fine when cold...not when warm.

[yammerslammer]

This just started over the weekend. My truck starts fine when cold, fires right up. After the engine is warmed up, it takes longer to start. It just cranks&cranks&cranks then fires right up. However, sometimes when its warm it will still fire right up with no problem. I changed out the fuel filter but that didnt help. Truck has no misses and runs great otherwise.

 

[corlon]

any cels? could try restting by doing a battery diconnect. very wierd though.

 

[yammerslammer]

No CEL.....It's an odd issue. Today, it has started just fine all day, warm, cold, etc....

 

[yammerslammer]

After reading thru several posts, I figure I have narrowed it down to a few things. Fuel pump, fuel pump regulator, and possibly even a crankshaft sensor. Guess I'll do a fuel line pressure test first.

 

[KWT2000]

don't forget the coolant temp sensor for the ECM that can cause some strange issues with starting