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Check the throttle body for loose hold-down bolts or leaky gaskets.
It's also possible that someone messed with the air mass flow screw on the throttle body, thinking that it's an idle screw. It's not, it's set at the factory and must not be touched after that.
It's also possible that someone messed with the air mass flow screw on the throttle body, thinking that it's an idle screw. It's not, it's set at the factory and must not be touched after that.
