Finally did it. Just what I suspected. Before the change: 7 psi @ idle, 5 psi cruising & 2 psi WOT. After install: 12.5 psi @ idle, 10.5 cruising & 9 psi WOT. Much better but is it good enough? I also installed Geno's high flow banjo bolts while I had lift pump out. What do you all think?

 

Idle is a little low, but the rest is about normal for a stock pump. You did better than me. Just had one changed under warranty. Was 12, 8, and I could pull it down to 3 @ WOT. <br>After replacement, I've got 1/2 psi more across the board. Heading back. I'd like to get a good one before I move it, and change the lines/fittings.<br>Seems pumps are a roll of the dice.

 

That sounds kind of low. My new one was 17 and 12.

 

Just my luck. &gt;

 

Wonder what Cummins West would say if I called them &amp; told them my pressure isn't up to snuff with the new pump I bought from them? ???

 

[quote author=MARKY MARK link=board=4;threadid=13668;start=0#129100 date=1050598495]<br>Wonder what Cummins West would say if I called them &amp; told them my pressure isn't up to snuff with the new pump I bought from them? ???<br>[/quote]<br><br>If I spent MY hard earned money on it I'd be raising [censored].<br><br>Chris

 

My brand new pump hovers between 13-14 at idle, 11-12 at cruise, 9-10 at WOT. It may just be the guage is a little off. I noticed the biggest difference in my WOT numbers when I added my hi-flow banjos.

 

Look at what I did. scroll to the bottom<br><br>Pre Filter and Pusher pump

 

i think i should get a new lift pump since im getting such bad fuel milage!! like 10 or 11 mpg! im still considering like dropping 15k on that truck to be one bad donkey &quot;HEHAAAAAAAAAAAAAAAAAAAAAAAAHHHHHHH&quot; truck what do u think?

 

I just got back from a 400 mile trip. All highway miles at 65 mph with 4.10 gears. Was getting 15 highway &amp; 11.5 city. Now with the new pump, I got 19.5 mpg. I will see what I get in city driving in a few weeks. I am happy now.