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Idleing question

1K views 4 replies 3 participants last post by  Austin Adams 
#1 ·
Hello all. My truck is a 2006 F-250 6.0l PSD. 55K miles, bone stock. I was driving it yesterday and noticed that my RPMs are fluctuating somewhat right above idle. Not alot, just barely half a line on the tach (about 50 RPM). Is this normal or a sign of things to come. Truck is under warranty yet. I have not been driving it lately, but my wife has been. Otherwise the truck runs fine. Any advice is appreciated. Thanks.
 
#2 ·
Was the air conditioner on?
 
#3 ·
Where in wisconsin are you?
 
#4 ·
No, the AC was off at the time. I am located in Manitowoc, WI.
 
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