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i have recently pulled the codes from my car and according to my Haynes manual "System Adaptice fuel too lean (Bank 2). can somebody clarify what this could be? I understand what running lean is, but what could be the culprit? i checked the vacum lines and the only one i found that was leaking was the one attached to the idle air solenoid, could this be the problem?
 

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Um, ya it could. Running lean is most often caused by a vacuum leak. If you know there's a leak, fix it. Clear the code. If it comes back, that wasn't the only problem. I have one question tho - are you sure the vacuum line is on the idle air solenoid, and not perhaps an EGR solenoid, or something like that? The IAC motor doesn't have a vacuum line - just an electrical connector.
 
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