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Idle Fluctuation

3575 Views 5 Replies 4 Participants Last post by  Klutch
Sometimes at idle I am experiencing a 50-75rpm fluctuation. Doesn't do it a lot, but when I stop the truck and put it in park and let it idle for 10sec. and then it will fluctuate for 5sec. then smooth out. Running higher fuel pressure seems to help, and it will just randomly do it. Any ideas or is it nothing to worry about. /ubbthreads/images/graemlins/shrug.gif
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Mine stumbled slightly when I first bought it like you are describing. I had a loose IC clamp on the cold air side. Cranked it down and it went away.
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