So a few weeks back I noticed my a/f learning 1 has been about -9 lately when cruising. in the past it's always been within 0 and -2. When under load it is around -5 but still drops to -9 when cruising.
I'm afraid it may be running lean. I haven't done anything different to the intake system, my car is a 2010 WRX, Cobb stage 2. Also, the only thing that happen a few months back was it threw a code when I was getting it coming up a mountain, it said turbo solenoid. I reflashed map and has been fine, the only thing noticeable is the A/F learning 1 is different.
Any help or insight would be appreciated.