today I was stuck in stand still traffic for two hours when I finally got free I noticed that my WOT afrs went lean. When I reached home I check the map to compare if it was the same and it was, let the car cooled and took it for a drive later same problem. I reset the ecu by removing the battery pole to reset my fuel trims then and drove the car out of boost for it to relearn, but anytime I go into boost same problem I am in the high 12's-13's afrs compared to the 11.6 what could be the problem.

 

intake temps... actual Temp.
If it continues just reflash it.

 

Before you start looking for a problem with the car I would verify the Wideband is reading correctly. It may be going bad or need calibrating.

 

your trims shouldnt need resetting - what were they b4 the reset?

 

all were within +/- 5% on the last tune.

 

update I failed to mention that I filled gas the same day this crap started happening. I ended up throwing two el chepo octane boost and the afr's are almost perfect again, I think these ****'s here in Trinidad are putting Super unleaded (91ron) in the Premium (95+) tanks and charging us the premium price.