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Have a 2017 pro4x non xd, bought with 8k march 2017, now have 70k. Since Ive had it always seems to rev up and down 500rpm or so. Tried cleaners, engine foam, "professional" dealer cleans, never seems to go away. Anyone else have this issue. Truck runs great, comfortable, and looks pretty.
Not sure if this is normal , taken to nissan and they say they don't notice or can't reproduce symptoms. Thanks for any input.
 

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the most common culprit of erratic idle is the IAC (Idle Air Control valve).
Understand they couldn't replicate the issue. Maybe if you clean that really good, it will help.
 
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