VP-44 cut out W.O.T. Skip, hesitation.

[overfueled]

I have done most or all to get rid of the skip or hesitation what ever you want to call it. I have not brought the truck to the dealer.



The truck's engine skips (4 times) at 1800-2200 RPM'S W. O. T. after 2300 the skip goes away and runs fine to 3200. But I have lost a lot of time.



When I slap the pedal to the floor this thing happens, if I do this slow I do not notice it hardly at all. I put on (3) new Lift Pumps. I change all the lines to 3/8, I went with aeroquip steel braded lines and fittings. It did not change a thing I still had the problem.



So I put on the two fuel pumps 1-15lb 100gph and 1-7lb 100gph pusher, no change the VP-44 will not handle W. O. T. Slap down.



The build date is 10-00 I think this is a KEY to what went on. I can also do this with the box off. I put it in drive and power break it will happen.



Does this Happen to YOU????????????????



Got to go work on the new Trans input shaft. Talk to you latter. Steven

 

[MikeR]

I put on (3) new Lift Pumps. I change all the lines to 3/8, I went with aeroquip steel braded lines and fittings. So I put on the two fuel pumps 1-15lb 100gph and 1-7lb 100gph pusher, no change the VP-44

With no change by the 2nd lift pump I would have stopped swapping pumps and started looking elsewhere.

Disconnect all of the Blue Chip wires so the truck is running 'stock' to see if it's a box wiring problem. Are there any trouble codes stored in the ecm?

 

[CumminsAholic]

Mine truck and a few other guys' will miss at WOT with the box on. But with the box off they're fine, no miss at all. Other than the box... I dunno, the VP44 could have a weak spot, but lets hope not. I replaced mine and it's not too cheap.

Corey