Fuel Pressure Regulator?

[FatAlbert85]

Ok, to make a long story short, I've just gotten my sr installed by a shop and we're at the last steps of gettin the motor running. The big issue at this point is that the car is leaning out badly under boost. Or, more to the point, under WOT. Not under vacuum. I'm thinking it may be the fuel pressure regulator that may be bad. Any ideas?

[vutony]

welll, u can get the nismo one and a gauge to make sure at 42ish psi with the vac line disconnected

wat fuel pump do u have

[574-240sx]

welll, u can get the nismo one and a gauge to make sure at 42ish psi with the vac line disconnected

wat fuel pump do u have

A stock fuel pump won't keep up for long.

[FatAlbert85]

Oh, the fuel pump is fine. I just had a Walbro 255 put in.

[da40]

hmmm???just try and replacing that fpr and see if it gets rid of ur problem

[vutony]

A stock fuel pump won't keep up for long.

, wat do got to say, nuttin

post whore

[S13FASTBACKSR]

usually when a fpr regulator goes bad you will be running rich. of course it wouldnt hurt to try but i would also check the injectors and make sure they are opening correctly.

[KA-Te]

I'd get a nismo fpr anyway, regardless if the stock one was bad or not.