Can anyone please tell me what the normal fuel pressure on my 2005 Dodge 3500 5.9 liter should be. I have a Quadzilla commander and it says 10 psi when I idle, but really drops down when I really get in the gas. I need some guidance on what I should do if anything.


2005 Dodge 3500 Silver, Volant Air Intake with Ram air, MBRP cat back exhuast with cat delete, Quadzilla Standard Module with controller.

 

10 @ idle is fine for a stock LP. Under boost, look for 5-7 PSI.

MIne would idle @ 5-7 and drop to 2-3 under boost, an then hit 0 under boost, and that is when I replaced the LP

 

Is my lift pump bad or do I just need an aux LP? BD sells one but I just don't know if mine is going bad. By the way mine does the exact same as yours.

 

I also have 9-10psi at idle and cruising with low boost, and when I nail it I can pull it down to 5-6psi. Not too worried yet

 

Nailed I am pulling 0 or near 0 , but I am worried about guage accuracy at the level. I can pull it very near or at 0 punched. I also have had stall. Seem to be a little slow now also.

Aboyut to replace intank with foss today. I'll let you know

 

look into a fuel system from gdp or fass. it will cure your low fuel pressure on hard acceleration issues

brett

 

does the GDP system totally bypass the OEM lift pump and does it have the capability of using a fuel pressure sender??