Thanks, me too.
Originally Posted by doccrowley
^^ 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!
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