Ok so I researched this and every one I found seemed to be when the engine was running.
I jumped in the 05 sti today just to start it up as I do every once in a while since its garaged, i noticed before I started it that the CEL is flashing. It doesnt stop as long as the key is engaged. Also the fan keeps turning on and off. Of course this has to happen the day someone says they will buy my car... Anyway, anyone know what this could be? Im assuming its probably a cheap fix. Engine is brand new so cant be that.
Also, how much would it cost to fix engine thats misfiring?