what should my fuel pressure be at on my truck?

 

stock.....17psi at idle and 30 or so while cruising. With your mods....40psi would be a good number to look for but you'll have to shim the OFV spring or go to an aftermarket pump like a FASS or Airdog.

 

My truck would run with 2-9 psi before I removed that junk a$$ lift pump and replaced it with a real one. I drove it a long time w/ that low pressure.

 

Wow i am suprised it ran with those low numbers. With a p-pump higher flow is better, if or when you get a different pump, dont be shy to look at something that puts out 40-50 psi, those p-pumps love high fuel pressure delivery especialy when modded.