Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum - View Single Post - Aftermarket SR O2 housing: which O2 sensor?

SHIFT_*grind* · 09-23-2007, 07:01 PM

In addition to the stuff already mentioned, I'll add this since it's probably relevant:

I can smell fuel pretty frequently while driving. I'm not sure if the car has a Walbro or other upgraded fuel pump, but if I can smell fuel (and it seems like the car's running rich), then it's probably safe to say that it does.

Maybe the pump is overrunning the stock FPR and flowing too much, and causing a rich mixture? I read about this possible problem when I did my RB20 swap several years ago, and made sure to install an adjustable FPR along with my Walbro 255; this car doesn't have one.

I'll check the other things for sure, just wondering if that's something I should consider as well.

09-23-2007, 07:01 PM	#15
SHIFT_grind Nissanaholic! Join Date: Nov 2004 Location: NWA Age: 42 Posts: 2,066 Trader Rating: (7)	In addition to the stuff already mentioned, I'll add this since it's probably relevant: I can smell fuel pretty frequently while driving. I'm not sure if the car has a Walbro or other upgraded fuel pump, but if I can smell fuel (and it seems like the car's running rich), then it's probably safe to say that it does. Maybe the pump is overrunning the stock FPR and flowing too much, and causing a rich mixture? I read about this possible problem when I did my RB20 swap several years ago, and made sure to install an adjustable FPR along with my Walbro 255; this car doesn't have one. I'll check the other things for sure, just wondering if that's something I should consider as well.