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Old 12-25-2011, 07:03 PM
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Random idle hesitation

Ok guys, after 3 years, Im having my first mechanical problem and need some guidance. My truck has developed a hesitation at idle that acts just like a misfire on a gas engine. It did it twice yesterday (that I noticed) but then today, it has been doing it about every 10-15 seconds. It's almost like the engine shuts off for a fraction of a second. It's enough of an interruption to the idle that the truck shakes when it does it. I will say that tge truck is bone stock other than studs that were in it when I bought it. I also bought fuel (at my normal station) on Friday and it probably had 50-75 miles on that tank the first time I noticed it. The truck has 116,xxx miles on it and it's about 800 miles from a scheduled fuel filter and water separator change.
If anyone has any ideas of what it may be, the help would be greatly appreciated. I'm hoping it's just water in the fuel( we did get a small flood the night before I filled up). And by the way, there is no check engine light or anything else out of tge ordinary. Thanks!!
Jesse
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Old 12-26-2011, 05:33 AM
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Anyone have any ideas?
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Old 12-26-2011, 05:59 AM
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Other then the random miss at idle it doesn't have any other issues? Does it cold start ok and have good power when it's cold?

Couple thoughts, you might either have something going on with the injectors/FICM, or possibly a cam/crank sensor issue.

I would have codes checked for the heck of it. See if anything is logged. It's going to be a real guessing game without knowing codes and a scanner though, especially if the problem is real intermittent.
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Old 12-26-2011, 06:22 AM
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Yeah, other than the hesitation, there is absolutely nothing out of the ordinary. I don't push it when it is cold, but it drives cold the same as it has since I bought it. Im going to get some of the redline additive with the water dispersant in it and I'll get them to see if there are any codes for the heck of it. I'm really hoping it's just water because it did come a flood here the night before I filled up. I'm at a half tank so I'm going to fill it back up today too. Thanks for the help and if Anyone has any other ideas, please let me know. Thanks!
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