Fuel Presure

[GREG91GT]

Why does my fp change one day i will set it at 40psi and a couple of days later it will be on 48 or50?

 

[HISSIN50]

Your guage is bad, bad regulator, fuel pump is going south, or you have some sort of restriction in the return line (there are others).

More info on components and how you test would help (if that is what you are lookin' for). Good luck.

 

[GREG91GT]

I have a FMU