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#440: 03-05-2013, 07:34 AM
KCwagon's Avatar
Title: Wagon Mafia Wiseguy
Location: Kansas City area
Car: 05 GT GRP 6-speed wagon, BNR18G
Posts: 1,548
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Originally Posted by doccrowley View Post
^^ when I was losing fuel pressure at WOT it was o-rings in the fuel basket.

Glad you found the source of trouble for your af/r's and hope it stays great from now on!
Thanks, me too.

I was getting ready to pull the basket, but was pretty sure it was not the issue, because changing the fuel pumps had no effect on my AFR's. I have spent about a year tracking down my issue. I guess it gave me something to do, right?

Over the past year I changed the:

1) Fuel Pump - from a Walbro to a 65C
2) Fuel Pressure regulator - I replaced the actual regulator, but left the rest of that mess in the factory bracket, which I am assuming was my issue. (The thing is a mess and am not sure if there is a check valve in there that could be leaking or not allowing the FPR to hold pressure ??? (Wiener) There is also a return hose that I am not sure of the exact function....)
3) Re-wired pump
4) Replaced the O2 sensors
5) Replaced the Turbo inlet with an aftermarket inlet