I did a WOT scan today and there is a quite large discrepancy between B1 and B2 at WOT B1 is 23.4 B2 is 9.3... the STFT's are both 0.0 the entire WOT pull. Any insight on the difference in the LTFT?

 

Probably a bad O2, how many miles are on them?

 

~110k!! if that were the case wouldn't there be some difference in the STFT?

 

I think STFT do not work at WOT... Also I think at WOT what ever the last reading of your LTFT were that is what it uses during the entire WOT pull. This is why it is important to have your VE table tuned correctly... Try switching your O2 sensors and drive it a couple of days and see if the numbers swap sides... If they switch sides then you have a bad O2 sensor, if they don't then more than likely you have an exhaust leak.

 

ahh, thats probably why they go to zero at WOT (but they show 0.0 at partial throttle at times also. I'm pretty sure I have an exhaust leak I need to tighten the collector bolts, I'm going to go ahead and get a new set of sensors, these are 100k+ and have served well but I think its time to upgrade.

 

regardless u should probably get your ve in check with a live tune