Engine/Transmission (1998.5 - 2002) TOO MUCH fuel pressure??

[tharonian]

Had the in-tank FP and vp44 replaced by DC just at end of warranty. As with many, not happy with lame fuel pressure at vp44. Just today ordered 2 (one spare) of the Cummins newer "campaign" lift pumps- pretty much same as stock LP for only $65. each. These are basically Carter pumps but are supposed to allow better free-flow through the pump if it dies. Cummins part #4090046- same pump dealer charges $200 for. Planning on mounting one of these on the rail near the tank in-line with the in-tank pump. Want to keep it simple.



I think this will work well. Just wondering if the 2 pumps in series could possibly deliver TOO MUCH pressure to the vp44. What can the vp44 handle and will this set-up exceed this?

Thanks

Tom

 

[mhenon]

I just did what you are about to do. My pressures are 26 psi @ idle, 24 @ cruise and 22 @ WOT. Bosch seems to want it closer to 15 psi although there are folks on this web-site that run quite a bit more with no problems. I just have a problem with the fact that DC has come up with a "fix" that is well below pressure that Bosch wants at the VP44. Don't those guy's talk to each other.

Anyway, i may add a pressure by-pass to my system but for now I'm not too worried. Given the two choices, too low or too high, I'll take the high side. I just don't see anyone posting threads about their VP exploding due to high pressure.

As with most things. . time will tell.

mike

 

[Graphic man]

save your money and up grade to a RASP pump... you will never have to worry about F/P again





pressure is one thing, but volume is what you want

the VP has a return spring that i believe opens at 14 psi, so any more than that is a waste and the more pressure you run the more heat you will have and heat is another thing that kills a VP



just my $0. 02



Scott