[ipatch]

i was running into idle issues with my ep3. the quick fix i've been using is to disconnect the vacuum hose going from your air box to your valve cover (ie the idle air assist valve). the iaav is only suppose to stay open for certain temperature duration. ie. it's suppose to help the car with cold starts, but when the car reaches temp it's suppose to shut. so a quick test is turn your car on let it get to operating temperatures and see if your iaav is still pulling a vacuum (ie sucking force) if so, then yours is faulty and stuck in the open position.

so plug the vacuum hose with a bolt and a zip tie of some sort and the engine should not be pulling extra from the iaav. after doing that my car has been idling great. i did take apart my throttle body while replacing my clutch and cleaned the iacv thoroughly and make sure it spun freely, but i still had idle issues thus i ran into the fix above. hope this helps.