My car has been doing some weird things recently... one of them being this.

My wideband at idle reads 13:1... yet my o2 feedback is reading between 10 and 25. From my understanding that means that my front o2 sensor is enriching the AFR's.

This makes no sense... The o2 feedback should be leaning the car out...not making it richer.

Could it be that the front o2 sensor is bad? Makes sense to me... I've run about 50 gallons of c16 and another 100 gallons of Trick 114L through it...maybe it was the one touch of ethanol that put it to rest.

Any advice?

 

positive trim adds fuel, negative takes out fuel. Or is that not what you are asking when you say "the 02 feedback should be leaning the car out"?

- Bryan

 

How old is your front o2 sensor? A bad o2 could be causing your fuel trims to being out of whack from what I have read.

 

Try a new front O2 Eric, however you may want to make a second map to scale the injectors on E85 since your scaling for 93/race gas was quite low compared to others to begin with...

 

I don't know if that is your problem, but leaded fuel will end an O2 sensors life quickly. It only took <5 gallons of VP C14 over a couple hundered miles to kill my front o2.

 

I've gone through 5 wideband sensors and I haven't replaced the front o2.

Freddie that's exactly what I was doing rescaling the injectors and resetting my latencies...and my o2 feedback was going nuts!

 

Probably time for a new front O2 buddy I know how much race gas this beast has seen especially that dirty *** Trick gas!

 

What WB? LC1, ZT2, etc?

 

AEM.

I used to have an LM1 Innovate...doesn't matter the brand the sensors are the same. Leaded race gas eats the sensors.

 

Yes, I know they all use the same sensor. I was just interested in which controller you were using.