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Can K&N make you run lean?

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Old 03-31-2010, 09:14 AM
Oren76's Avatar
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Join Date: Mar 2010
Location: San Antonio, Texas
Posts: 7
Default Can K&N make you run lean?

I have a 2006 C230 sport, v6 (obviously ).

I just changed spark plugs and replaced both filters with K&N air filters. I had no issues the first day but now the Check Engine light is on. I had Autozone run the codes and it said it's running "Lean."

Can the filters do that? Is it going to self adjust (i.e., like altitude changes)?
Is there a manual adjustment I need to make?

The car runs fine, and I'd hate to have wasted $120 on filters only to have to revert back to the paper ones.
 
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