Last week when it was in the 60s, low 70s and the cruising AFR was good. Today is one of the warmer days we've gotten in MA this Spring. Low 80s outside. Did some running around today for work and I've noticed the car is running lean while cruising. While cruising I use to be in 14-15s but now I'm in the 16-18s.... IAT is around ambient and the coolant is in the 200 range. First time I've seen this condition so not sure what's changed with the tune. Here is my tune and a log (car details in my sig.)

 

Tune your MAT air density table

 

So I adjusted this, and it's much better now. I made very small incremental adjustments and it's way better today under the same weather conditions. Amazing how such a small change can effect the tune so much. Thanks.