At stop lights after warm engine, idle decreases from 600 to 400 in about a second

Asked by Feb 20, 2017 at 05:24 PM about the 2007 Ford Explorer Eddie Bauer 4WD

Question type: Maintenance & Repair

I have an 07 explorer, 4.0L. At a stop light, I can feel the engine rpm dropping from 600 rpm to 400 rpm, then back up to 600 rpm. this happens every 3 to 5 seconds. It just started doing that today. Nothing electronic in the vehicle is on. The engine light and wrench light is not on

2 Answers

Also, after pushing the gas when the light turns green, it kind of stutters a bit before going.

21,700

Clean the throttle body and IAC. The IAC could also be faulty.

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