2013 GT Rpms bounces up and down at idle - Mustang Evolution

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Old 09-20-2016, 10:45 AM   #1
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2013 GT Rpms bounces up and down at idle

I have a 2013 mustang GT and after the car warms up the rpms go from 800 to around 600 about every 25 seconds with or without the a/c on, but it drives fine and has no codes. Has anyone else had this problem or is it normal?
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Old 09-20-2016, 10:24 PM   #2
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Mine does the same thing. Maybe not EVERY 25 seconds but it does bounce up and down from time to time and it doesn't seem to be doing any harm
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Old 09-20-2016, 11:52 PM   #3
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Can you feel it? and hear it in the exhaust? like its got a hiccup? If so, thats normal and its something to do with saving fuel at idle. Check out your owners manual, it talks about it, totally normal. Mine does it, however I don't remember the rpm going down, id have to pay attention to it more carefully at idle.
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Old 09-21-2016, 05:39 AM   #4
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is the air flow set to windshield? That kicks on the AC. These do try to idle as slow as possible for fuel economy. There will be some vibration/change. Look in the owners manual for "idle re-learn" and see if that helps. Easy/free but other than that I wouldn't worry.
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Old 09-21-2016, 09:05 AM   #5
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yea you can feel it and hear it in the exhaust
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Old 09-22-2016, 12:25 AM   #6
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Quote:
Originally Posted by 5.OHBRUH View Post
yea you can feel it and hear it in the exhaust
Normal!!!
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