Had my stock no tune car at the dealership for two days this week for a stalling issue and the yellow wrench light come on and going off. Got the call today and they said there was no codes for the light and they had to remote my PCM to ford to have them read it. They didn't find any codes either but the dealer sent it to them because they thought I had tune the car.
So, we now know the dealership will contact ford and ford will remotely read the PCM better than what the dealer can. This is just an FYI. I'm not sure if I'm glad I didnt have a tune or sad. I kind of want to see if ford would be able to see anything from a tune.
Hmm - interesting... So I wonder, if you did have a tune they wouldn't of warranty the stalling issue?