What RPM should my 4.6 idle at? | Ford Explorer - Ford Ranger Forums - Serious Explorations

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What RPM should my 4.6 idle at?


Active Member
August 8, 2011
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Year, Model & Trim Level
2003 Explorer 4.8 AWD
The first thing I would like to say is that I did use the search tool, but was unable to find the exact answer I was looking for.

I'm thinking my IAC is shot, but I did clean it and I want to confirm that I'm idling where I should be.

Cold start in park: 1100 rpm
Cold in drive: 1000 rpm

Warm park: 500
Warm drive: 500

This sounds really low to me, and the engine wants to stall once it hits 400 rpm (which it does rarely when at a stop light). Otherwise, the idle is smooth, and there is no vibration.