My car came with a K&N, I have done the normal clean and re-oil a couple times with no detrimental effects. I started getting the hunting idle.
I did a complete Throttle body, tubes, MAF (Use MAF cleaner) and now my idle is rock steady
I had switched to a K&N on my mustang and was concerned about the MAF getting fouled but it never effected it
I think you need to see what residue maybe lurking in your throttle body and using some MAF cleaner.
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2002 S - old school third pedal
Seal Grey
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