So I have been chasing this little gremlin and cannot find a reason why it does this. But when I am at low speeds and just start to get on the throttle, sometimes my LTFT's will both jump to 25% + and Torque Management Advance will pull some timing. Then as soon as the STFT's return to normal the TMA drops to zero. This is not affecting Long Term Fuel Trims at all. I suspect this could be a Catalyst Test??? Any one have any ideas?
I have AFE mids and the rear O2 efficiency test is disabled so that I do not get any codes. The master Catalyst Test is still enabled though. I may disable this and see if it goes away but was wondering if anyone had some other insight.
15.hpl
STFT.PNG
Thanks