03 GTP with mods per my sig + 104 plugs. 103k miles. All data given below per aeroforce, no wideband. No DTCs are present.
While cruising the car is perfect, fuel economy is normal, and the car was great prior to mods.
Seeing a lot of KR under even moderate acceleration, or more or less anytime MAP is more than 2 PSI. KR builds fast even at 1/2 throttle with boost, so I let off immediately upon seeing that. Cmdd AF is still 14.7 though I think, and timing drops to about 14*.
In 2nd gear at 3000 RPM, moderate acceleration, shows no KR yet but is giving off a noise like a cross between a dog chattering its teeth and somebody holding a big paper flapping in a strong wind. I quickly let off. Not SC coupler noise.
Long trim bank 1 fluctuates positive and negative a few numbers, averages zeroish during cruise.
O2 mV under cruise is anywhere from 80 to 900 during cruise, if you even care.
False knock possibility: IIRC sway bar was a good 1.5" from the DP. O2 was about 0.5" from firewall insulation, and the wires have not sheared off so I don't think it touches. You can remove and install an O2 without budging the DP.
Have been in and out of hospitals for 2 months with little time to tinker, which is why I created a thread for help. Many threads like this, but very few OP's post their solution.
Checking plugs would the first thing I do, so what else?
