Re: Hello everyone! long time reader, first time poster.
If it's only happening at idle and still drives fine check your IAC valve. A quick but not full test is to simply unplug it while the truck is running. If it gets worse or stalls completely then the IAC is still functioning somewhat. If there's no change at all then the valve is stuck closed or clogged. Still easy enough to just pop it off and scrub it with carb cleaner and make sure the valve moves freely.
Last edited by Dirtman; 08-16-2018 at 05:48 AM.
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