When the problem is ongoing, engine idling, block off the mouth of throttle body, it should kill the engine, if very little or no effect, you got false air getting in there from somewhere. Check and clean throttle body and idle air system. Any applicable trouble codes?
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When the problem is ongoing, engine idling, block off the mouth of throttle body, it should kill the engine, if very little or no effect, you got false air getting in there from somewhere. Check and clean throttle body and idle air system. Any applicable trouble codes?