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Re: Idles high after going from park to gear and back.
For what it's worth, I had a random creeping idle a month or so back. After reading data and watching IAC counts just creep up, changing the IAC, and checking everything else, it turned out to be a very slight leak in a vacuum line from the MAP to the TB. Turns out the line had stiffened up and sometimes would allow a little air in. Swapped it and no more issue.
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Mike
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