2005 f150 4.2

[SFC]

When I have been on a long trip & shut the veh. off & try to start within 5 to 10 min. Truck sputters & misses for about 1 min on start up. Only did this during warmer weather, no issues this winter. Could this be the fuel regulator?

[Scott K]

I would be checking the fuel system for sure.

[Jeremy airjer W]

I'll second that.

[jeffreyd]

i would suspect the fuel pump itself. how many miles are on it? can you hear the pump whine in the tank? do you run the truck low on fuel below 1/4 often? these will and are indicators that the pump might be going. Had a taurus that would start fine cold, after driving for a while, it would not start. let it set for an hour or so, it would fire up, the fuel was getting warm enough that the pump would seize until it cooled off and the cycle would start again.

[SFC]

About 80,000 miles. I hear a whine or whistleing sound only when the outside temps are from 20 degrees & colder, louder when below zero. It makes this noise when excelerating, when I let off the gas it stops for awhile. Sounds like noise is coming from engine comp. area. No issues in cold weather on startup with engine warmed up. Had a little bit of the whistling since I bought brand new,but only at -10 degrees or colder & quit after warm up.

[fishing tech]

It sounds like it is normal. What happens with the winter blend of fuel is it will boil in the fuel line on warm days after the vehicle is shut off. This causes air in the fuel lines which makes it start hard and run like [PoorWordUsage] until it clears out. Before you go throwing money away on parts I would wait another month when the winter blend is used up and see what it does under the same conditions.