I have a 7FGU30 Serial # is 62230 it has the 4Y ECS Gasoline engine in it. The issue the truck is having is when you first start it in the morning it will start however if you run it just a few minutes without letting it warm up and shut it back off and attempt to restart it, it cranks and cranks before starting and after it starts its very sluggish, you can attempt to rev it up but it spits and spudders until it clears up, if you let it warm up it starts no problem every time.
What Ive done....
Truck has hot spark while cranking
Replaced electric fuel pump and filter
Replaced both coolant sensors
Replaced plugs
O2 sensor reads.1 lean and 0.9 to 1 volt rich
Engine compression 110 psi across all holes(book says spec it 178 good 122 minumum)
Any tips or ideas would be greatly helpful cannot find anything else and at a dead end.
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