Drifting Idle AFRs
 

I am having an interesting issue. When I start my car, the idle will be at maybe 15:1, then slowly gets richer to about the mid 13's, and after I beat on it a little, it will move all the way to the low 11's. Attached is a short datalog and my tune. Am I missing something here?

My setup: Stock Injectors, DIY MS1 Standalone, LC-1.

I see you're idling at around 900 RPM and 25 kPa. Try making all four cells in that area the same value and see if that improves things.

Making the four cells around idle all the same helped a bit, but it did not completely solve the issue. I think part of the issue at this point is IAT heatsoak. Idling with tuner studio open, I saw the MAT rise to over 130F, on a 60F day. This car still has the stock airbox & sensor.

-Rouphis