OnyxCobra

Is there any reason I shouldn't just get a 255lph fuel pump?

ikeybmg

id have a 255. i figured it would pump enuf fuel for about as much HP as id ever want to go.

randy78045

thats the point exactly... how much fuel do you need? The stock pump will go a very long way...

OnyxCobra

well, when i turn my car off i lose fuel pressure and i think the fuel pump is the next thing to replace to try to find the problem...

randy78045

replacing parts until you "find" the problem is not the way to go... and why would you NOT loose fuel pressure when you turn you car off????

Krusher

wait a min... let me get this straight... when you turn the car off you lose fuel pressure? I hate to tell you this but you should do what's called a fuel system test which tests for fuel leakdown rates and relative fuel injector flow rates... you probably have a leaking injector... or you have a leaking fuel system... or that check valve isn't working...

Krusher

FRP shouldn't drop to zero when you kill the motor... that's what the check valve is for. But 1-2 drops per injector is considered acceptable.

ikeybmg

yea i dont think thats your fuel pump. sounds like a leak. pressure test is a good idea. but if youre going to do some modding to your motor (or have already) id just get the 255 instead of the 190.

Krusher

pressure guage will only tell you if you lose pressure right away... you NEED to have a system test done with a WDS or IDS at your dealership... that will pinpoint your problem... unless you can lift your vehicle, jumper across the pump relay to have it constantly run and check for leaks external to the fuel rail.

ikeybmg

leak could be anywhere, system test is what i meant, just didnt word it right.