Ms3 pro high idle afr issues
 

Aloha,

I run Mk turbo and all is well on it. Just trying to smooth out small kinks in tune.
car cold and warming up, afr is good, beginning few laps drifting, all is good. Once car is hot and been running for a while, my idle afr is constant 17-18/non-readable. During acceleration, afr is good.

will post logs when home in 40 mins, just seeing if anyones experienced this before.

believe this log has the high afr during idle

Is this after turning off and being turned back on, it is leaning out?

Common cause is fuel rail is heatsoaked, and fuel is boiling, have to run the car for a bit for it to pull heat out of that area and get cooler fuel in the rail and to cool the rail down.