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Before I buy a new AOS...


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First off I'd like to say hello since I am new to this forum. I have a 2001 Boxster S 6 speed with 42,000 miles on it. I bought it last year with 22,000 miles so I have been doing a good bit of driving in it lately. Ok now onto my problem. I have done plenty of searches so I pretty much know what is going on but wanted to make sure. The car threw a CEL about three months ago with the code P1126 which I know means it's running lean on that side and the DME has richened it up all the way. I cleaned the MAF and it didn't help and as far as I know a MAF will through both codes for the left and right side of the engine correct? I also have "some" of the signs of a bad AOS. It has oil build up all around it and it seeping out of the intake tubes after the throttle body. I also have the whining noise at start up but it goes away after a minute or two. I removed the oil cap today with it running and it's sucking a lot of air in and the engine RPM's climb but it wasn't difficult to remove the cap. I have read that it is really hard to remove the cap if it's a bad AOS. So before I spend needless money what should I do? MAF or AOS? Thanks in advance!

Edit: I should also add that I do not get any smoke on start up unless the car sits for a few weeks.

Edited by Rated-S
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