My Brenspeed tune had the rear O2s off, despite me mentioning they needed to me on. It sucks that I wasted a trip to DEQ, but in fairness to them they corrected it the same day I called. Mistakes happen. I bet your tune is the culprit.

 

Okay thanks for all the help guys. I will give brenspeed a call tomorrow and hopefully I just need the tune.

 

You could use non-foulers.