I'm not trying to start anything believe me, but how many people having this problem have PCMForless Tuning. Please don't get me wrong because their service has been excellent just wondering if were looking at some kind of PCM tuning issue? BTW I have the same symptoms - my car runs perfect after I first start it, but deteriorates after it warms up - goes into closed loop. Car is fine at WOT just seems to become less smooth at between 2200 an 3000 in 1st, 2nd or 3rd under mild loads.

I'm putting in heated 02's this weekend. If it still has problem I'm gonna send Rooster a new file and have him look at these areas in particular.