hey guys i just installed a fuel pressure guage on my procharged NNBS...as i started it up it read 60lbs 10sec later it fell to about 42lbs..is this normal?? what pressure are you guys getting at ilde??

 

im at about 58. what does it do when you give it some gas?

 

It stays close to 42-44 lbs of pressure when I give it gas..I have 60 lbs injectors should it always be close to 60????

 

Anybody????...help

 

What does your fuel system consist of? What kind of gauge do you have and how is it hooked up? If you are running off the factory regulator then you should see around 58psi at the rails.

 

My truck is a 08 5.3...my pressure guage is an autometer electric guage, it is connected to the fuel rail..as far as my fuel system I installed a aeromotive stealth 340 fuel pump..I replaced my oem pump with this one..i had to modify the module a bit to adapt the new pump..other than that that is all I've done to the fuel system..

 

this is the pump i installed...i was told it would be a simple swap. part #11140

 

Loose clamp(s) on the in-tank hose?

Rick

 

does your truck have a inline fuel filter ? if so thats your problem i bet. same exact thing happened to me after i put my new fuel system in and i chased the problem for a couple weeks and ended up being my brand new summit fuel filter was clogged to hell . i removed the removable screen from the filter and bam instant psi change at idol and wot fuel pressure went to where it was suppose to be all over a dime size filter. wanted to shoot my self in the face after that , i even went to the extent of buy 2 new pumps even thou the ones i had in there were brand new, but i didnt think my filter would be clogged cause it was brand new too less then 5 miles on whole fuel system....

 

Dont nnbs trucks have some sort of variable fuel pressure system?