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Weird Rough idle

2K views 7 replies 2 participants last post by  Ethan.johnson6oh 
#1 ·
I have an 05 6.0 with new injector harness, new motorcraft icp and ipr, icp plug is new, ficm is new, warren diesel injectors put in in July, numbers aren’t showing hpop leak, air test doesn’t show anything, truck idles rough when I take load off the engine like turning off the air conditioning in park. Doesn’t lack power doesn’t smoke, starts fine hot or cold. Driving me nuts. No codes, I’m lost for ideas
 
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