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Message: <blockquote data-quote="mast240" data-source="post: 7426930" data-attributes="member: 631695">the main reason that this happens, with a new alt, is cuz it puts alot more strain on your engine... and thats really noticeable at idle.... sometimes it just takes your ecu a lil while to "learn" a new fuel map... and sometimes it can just be a pre-exisiting condition, that has only become noticeable with the extra load on the engine..i would give it a few days, and see if it corrects itself, and if not, start by checking your plugs for fouling (as they will usually give you a sign of there being a fuel problem)</blockquote>

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