hi, my AF learning 1, 2 and 4 is about +- 2, but my AF learning 3 is 13%, can i know what causes that? i had cleaned maf with contact cleaner, checked vaccum, boost , exhaust leaks, checked all hose connections, but have no idea what caused it. any one with experience with this ? mine is 05 wrx , everything stock.
Could it be my maf sensor being bad? As I had random misfire 0302 code, but when I clean my maf with contact cleaner, the code will go away on it's own, and come back once a while. Could my high C range cause by a bad maf? Which under read my air going into the engine?