Hey guys,
I've been noticing that for the past little while the car has been running rich. I'm not entirely sure how rich its running but its definitely very noticeable. Only mod I think that could affect it would be the intake. Also, I think that's why my car isn't performing to its full potential. I've several different OBDII dongles in hopes of adjusting the degree but none of them would connect to the car to my phone, or any of my devices to that matter. Don't have any codes besides the IACV which has nothing really to do with afr but I would really appreciate any sort of input. COME ON GUYS! Can't keep loosing to a camry!

 

If your car is indeed running rich, then there are two suspects: a) Your primary O2 sensors, and b) Your injectors. When is the last time you replaced your O2 sensors, if ever?

 

I was thinking o2 sensors as well, I have not replaced them. I have no idea if the previous owners did or not either. where are the primaries located?

 

https://maxima.org/forums/5th-genera...on-issues.html

 

Thanks man! now the question would be, if replacing the primaries didn't work and the injectors are fine, what else could be problematic?

 

My situation is a bit different, but it is simple and MAY solve your problem. My Greddy EU is street tuned and should not have any issues. However, over the winter I was throwing a code for running rich. All 3 of my O2's (fed spec) were new OEM so that was not the problem. My mechanic suggested my intake air temp sensor which I have tied up as I don't have a stock intake. So I got a new intake temp sensor from Nissan for $30CDN. Changed it and after driving enough for an ECU refresh, my SES light went off, gas mileage improved and no gas smell from my exhaust.

 

hmmmm that's interesting.. I may have to try that