I've read the few threads out there regarding fuel pressures on the 3rd gen trucks, but couldn't find anything really solid regarding a stock truck that is running correctly.

So what post filter pressures are you all seeing on a 03-04 H.O. motor with a healthy, stock lift pump assuming a clean filter and at full operating temps?


Mike

 

With a clean filter I've seen as high as 7-7.5 at idle and 6.5 at cruise. 5000 miles into it now and I'm around 6.5 idle and 5.5 cruise.

 

My stock truck runs between 8 & 9 psi.

 

Mine stays between 6-8 unless I really get on it then it drops down to about 2 psi. On occasion it will drop to 0 on a hard run or if it's super cold out.....