I need to know the stock fuel pressure for a Honda Civic 98. I just put on a fuel pressure regulator and I do not want to under or over do it. also with a fuel pressure regulator what should I set the fuel pressure at. I have a intake, header, and complete high flow exhaust. The car is a HX and i cant help but notice that it runs lean.

 

My civic is a 98 HX with intake exhaust and headder

 

how many pounds is your fuel pressure gauge reading right now

 

38 to 42 PSI i believe

 

At first i just put a fule pressure regulator and just tuned it by ear. i was only running 30 psi when i put the gauge on. i drive it like that for a few weeks. i hope i didnt mess anything up. now i have it tuned to 39 psi. i think im gunna juice it upto 40 tho. thanks.