Well its on and running:hyper:There is a noticeable difference, Lot's more power, No more code's (216):thumb1:Truck is quite abit smoother, Don't rattle as much, (this could be me)....................The fuel pressure is at 1 to 1 1/2 psilower than it was, Going to replace the almost new fuel filter, Just to see if thats it.Still at 12psi lowside,, was at 13/14, High was 16-18. Now 15-17.Thanks,,,,JKIDD.Later Ed

I am confused. I think you are saying the FP is 1-1.5 PSI below the previous reading. That's not the way I first read your post.Russ

Sound like the overflow valve is weaker?

Yes,, my fuel pressure is atleast 1-psi lower than it was before the new, (rebuilt) vp-44.I paid close attenion to the pressures,, before and after.