Take that K&N filter and throw it away!!!!!!!!!!!!!! Use mineral spirits or similar and wipe all of the oil residue out of the airbox and tubes going to the engine. If necessary remove them, wash them out with Dawn degt, and dry them out and reassemble the whole mess, Use the MAF cleaner to clean the sensor.
Sorry if this has been mentioned before, I quit reading on page 2 after I saw K&N mentioned. The DO NOT clean the air better than a normal filter, they just allow for a greater flow of air, which means more stuff has to be getting thru that is bad for the engine. Some will argue this, but That is ONE place you need to start. Then work on the rough idle issue.
Charles
