Partial Throttle PE Issue

[pganci]

My truck started doing this weird stumbling when in PE under part throttle acceleration.

It seems to have started after changing my A/C compressor which should have no effect but that is the only thing that has been done. It only appears to happen when doing light partial throttle acceleration and it goes into PE mode, i can see from the log my AFR going rich i just don't see what might be causing it. I switched out the O2 sensors with no change.

In the attached log if you go to 2.27 you can see 3 rich spikes while accelerating and then again at 2.34. I am running 2 WB on the same bank, the AFR500 which is usually much steadier is dipping while the AEM that normally fluctuates more seems to be closer to CMD AFR.

Attached is current Tune and log, any input would be greatly appreciated.

16-05-02 16-33-00.hpl
Ganci E38 T42 Dyno 2.75 Pulley V3 04.29.2016.1.hpt

[pganci]

I was able to get this figured out yesterday when it threw a P2135 code and went into limp mode. Throttle position sensor, i borrowed a TB from a local shop and the problem is gone. They told me its not uncommon with forced induction and that Nick Williams made a boosted version of the 102mm.