Fuel Pressure Check

[DammitBobby]

I am trying to check my fuel pressure. According to the FMU I should have at idle 34psi. My idle is showing less then 10psi. When I cut the car off it goes to 0psi. If you are running a fuel gauge what is your pressure at idle and what is it when you cut the engine off? I think my regulator is bad. This may explained why I was running lean today at the Dyno.

[Nismo_Freak]

Bad regulator... I'd be willing to bet your car is hard to start as well.

Everyone should have 34+ psi of base idle pressure.

[DammitBobby]

Hmm now should I install a NISMO FPR or go stock? I guess I will replace the fuel pump too.

[IanS13]

40psi idle with walbro 255 a little to high. i hope this does not cause a problem with the 370cc injectors.

[DammitBobby]

Can I just unplug the vacuum line from the stock FPR leave it in place and install an adjustable external fuel pressure regulator? If I buy the NISMO FPR I can`t use it when I upgrade my fuel rail.

[klattr1]

I am trying to check my fuel pressure. According to the FMU I should have at idle 34psi. My idle is showing less then 10psi. When I cut the car off it goes to 0psi. If you are running a fuel gauge what is your pressure at idle and what is it when you cut the engine off? I think my regulator is bad. This may explained why I was running lean today at the Dyno.

wheew. lucky your car is still running. 10 psi is bad.i hope you get it fixed soon.

[Nismo_Freak]

Aeromotive FPR > Nismo FPR

By alot.

[MarkEmark]

Aeromotive FPR > Nismo FPR

By alot.

True that, they look a lot better too...get one with a built in liquid fuel gauge and you'll be all set.

[DammitBobby]

Do I have to remove the old stock FPR??

[DammitBobby]

Ok figured out what the problem with low PSI readings. I had the gauge on the return line not the pressure line. SOMEBODY SLAP ME SILLY!!

[Bronze MFP]

we'll let you slide this time, but only because you are guinne pigging the boostdesigns kit for us