Neat little "OPEX"(operator experience) about our AFMs. For the last year or so I have been getting a check engine light with codes 24 and 31. The weird thing was that it would come on at high loads (mostly prolonged partial throttle,50-60%, on the highway) and there would be no difference in performance. As soon as the car was shutdown and restarted, the engine light would be out. I tried several different AFMS but same problem. Anyways I just finished putting my new intercooler pipes in my car and drove it for the first time since Sep and the codes came again. Then as I was looking at my custom built(I didn't want to spend $90+ on a frigging accordian hose) I remembered an article I had read about KV AFMs and one of the reasons for their extinction. THey can't/don't like to be mounted anyway but flat. Mine was rotated 45-50 degrees. I altered the AFM to sit flat, drove the piss out of the car.....NO MORE ENGINE LIGHT!!! Hurray! Now to do something about thoes flapping side moldings.......