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Message: <blockquote data-quote="stutaeng" data-source="post: 28876" data-attributes="member: 6175">When you have both bank lean and the numbers are close, you can suspect fuel delivery, so check fuel pressure...To see if you have a vacuum leak, you monitor fuel trims at idle, then rev tbe engine and the fuel trims should improve. Yours did at 2500 somewhat. Can you check and rev a bit higher?You may have a combination ofbthings going on also.</blockquote>