I am having an off idle stumble problem while in park. I set the fuel composition to 180 from the 166 and my AFR at idle is 13.0-13.5 vs 15.0-15.5
So that was fixed rather nicely, but ever since swapping to this chip, I have had an off idle stumble. If I jab the throttle in park, car hesitates really bad for a second and then catches. During this, I notice the WB going to 17 or more for that same time. I dont have any logs...sorry. Just thought I could add fuel and correct it.
The last 4 TT chips including SD chips never had this problem.
Any ideas, lemme know