I had an Uprev tuner before and did log some runs with different season. During the summer month, I was hitting the desired AFR target, but winter comes AFR seems a tad rich due to extra moisture in the air. I noticed that in the first year of my Etune and the following past years this always the case. It might also be important to tune the car in near ideal average ambient temp? Mine was etuned during summer time which was around 80+ F.
What I did after was to create a winter performance map and summer performance....problem solved!
|