R33 Gtst Fuel System

[savage1987]

can someone help me understand how the fuel system works in this car? There are what appear to be two fuel pressure regulators inline upon exit from the fuel rail, and neither of them appear aftermarket. The one right on the end of the rail has a manifold pressure/vacuum feed line, then the one after that is on the strut tower... I'm confused unless that one on the strut tower is just a dampener??

I'm sure I've got a pressure issue that isn't feeding reliable pressure under boost so the power breaks down in a weird fluttering sound.... boost pressure stays up just the power isn't there.

Edited October 1, 2011 by savage1987

[JonnoHR31]

the one on the end of the rail near cyl 1 is the pressure reg, the other one is just a dampener.

what boost are you running with what ecu?

[savage1987]

adjusting boost all over the place using the dual stage turbosmart manual boost controller that was in the car when i got it.... keeping it really low to try to rule out fuel cut from what i assume is the standard ECU (haven't looked)

[JonnoHR31]

does it do it running standard boost? if not then your simply running too much boost

[savage1987]

does it do it running standard boost? if not then your simply running too much boost

seems to have become more sensible when I dialled the boost right down so I think this may have been a contributing factor. I don't know where standard is on the factory gauge, we bought the car like this

I have a new fuel pump to throw in (Walbro GSS342) and I want to find an injector rebuild kit for it as well. I have replaced the filter and all engine bay lines for peace of mind, and I will do the rear lines when the pump goes in.