Did you recently service the K&N filters (clean and re-oil)? I've read if you "over-oil" some of that can get onto the MAF sensors. However, you could try to wipe them clean with a good microfibre cloth and see if it happens again. Some member have reported this and that's what they have done. I'm pretty sure it's not a rich/lean condition.
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2012 GT-R Black Edition Jet Black
2010 370Z 40th Anniversary // SOLD
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