Can bad O2 sensros cause your car to run really rich? I mean like stupidly Rich at idle it runs 12-13 and while driving down the block id dips into the 10s not going over 10 pounds of mercury. What could be causeing this? I also switched my Wideband sensors from the passanger to the driver side and both banks are running this rich.

It happend before, but went away for some reason. Now its just staying like that I unpluged utec and switch to stock ecu and its doing the same.

 

I'd like to know also? I've had a bad sensor since I first put my TN in. But the A/F has been pretty much great all across the board. It runs a little bit richer when there's hotter days. I kind of just stop worrying about. But you have a different case and I'd like to see how much if any, that an O2 can through it off.

 

F*ck So itsprobably not an 02. The thing is also it seems to act the same way in adding fuel but just every thing is richer alot richer I cant even rev the car now because it runs so rich. I'll make a video of it later on today. It must be some sort of electrical problem though.

Edit: this is supra crazy on my friends computer.

 

I'm not ruling it out. I just know on my car, everything is ok. I know alot of others have had bad O2 sensors and were just wondering how to fix to get the CEL to go away.They never said anything about overall effect.

 

Yea true but serious ly this is a huge differance in a/f ratio.
it might be something else