!!!!!!!!!I am desperate for any ideas here!!!!!!!!!!!!!!

We have a 1987 ford ranger with a 4D55T repower that ran great but leaked fuel at the throttle shaft so I took the pump in for a rebuild and all is not well. The leak is fixed, but the engine just doesn't run right now.

There is a fairly consistent misfire through out the range that gets much worse at idle,

It will only barely idle,

It lopes badly at idle and will rev up and down until finally stalls when the RPM drops. Seems like a governor issue, but I don't know the internals of these pumps.

Smokes pretty badly,

No power

The truck could kick the tires loose before the pump was rebuilt, but now it can't even climb our driveway in high range.

The guy at the pump shop insists all the settings of the pump are in spec.

I took the injectors apart and cleaned them and they have new nozzles- no change

Checked the timing belt position 3 times and it is where it should be. Also tried many different timing positions to no avail.

Valve train is all good, compression good, fuel delivery good. Even tried running the engine out of a bottle to eliminate any potential restriction in the fuel system of the truck.

Like I said, I'm desperate here, if you have ideas at all, please post them!!! <img src="/forums/images/graemlins/barf.gif" alt="" />