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confused idle

680 views 3 replies 3 participants last post by  Arisley 
#1 ·
Usually my truck will idle dead @750,lately it's been pulsing up and down,
645-760.The idle gets rough and the performance is noticeably sluggish.Newer
ICP,CPR,oil fuel filters ect...IPR?bad injector rings? No codes.Thanxs.
 
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