hey i just scooped up another impreza its a Ej18 GF6 auto it was running like s*** when i got it.. put a spare ej20 coil pack, leads and plugs on it runs smooth now, i just have one problem i need to solve its got a check engine light when it idols when its warm, as soon as you touch the gas pedal, in goes away until u take your foot off, so far ive changed the afm module, and its still the same, what else could it be, was thinking 02 sensor??? any help would be grateful
ethan