Decent-sized vacuum leak or throttle sticking open due to cables binding, possibly. That's something you'll want to get on right away in the driveway, so it's in park and can be shut-down as necessary.
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Decent-sized vacuum leak or throttle sticking open due to cables binding, possibly. That's something you'll want to get on right away in the driveway, so it's in park and can be shut-down as necessary.