Quote:
Originally Posted by WRX_GF8
When you cleaned the k & n filter did you oil it ? If so, clean it again and put it back in dry. Then clean your air flow meter with contact cleaner, the k & n oil will coat the hot wire in the air flow meter and cause the engine to run rough in many circumstances.
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DO not use a K&N filter without oiling it! They do not filter properly if they aren't oiled.
Take it to your mechanic and get them to have a quick look and listen.