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Old 11-20-2009, 09:07 AM   #1
ted_pulliam
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High idle after using cruise on interstate

I notice that my idle increases by 75 or so rpm after a run down the interstate at 65 - 70 miles per hour with the cruise set.

When I stop the engine and restart it the idle drops back down until the next time I use cruise.

What could be causing this?

Ted
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Old 11-20-2009, 11:31 AM   #2
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mine will go up 100-150 after a long run on CC. its sorta strange but has not left me stranded I dont know if its in need of a reflash or what, but I wont take my truck back to the dealer for nothing. my truck is not stock anymore.
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Old 11-20-2009, 12:42 PM   #3
ted_pulliam
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Quote:
Originally Posted by rebal View Post
mine will go up 100-150 after a long run on CC. its sorta strange but has not left me stranded I dont know if its in need of a reflash or what, but I wont take my truck back to the dealer for nothing. my truck is not stock anymore.
thanks rebal. I won't worry too much about this since the truck runs good otherwise.

Ted
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Old 11-20-2009, 08:53 PM   #4
SWC
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When I had this problem the Pacbrake would not engage. This all tied into the APPS going out on me. If you have no other problems don't worry about it. I found away around the exhaust brake problem and put up with the idle issue for 4 years. When I started having dead pedal issues on a trip I replace the APPS and everything is fine now.
Stan
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Old 11-24-2009, 12:40 PM   #5
ldornak
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x2 on the APPS. I had the exact same issue - high idle after using cruise. I replaced my APPS and the problem went away.
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Old 11-27-2009, 11:07 PM   #6
sheriffav8r
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It's totally normal. Do a search on it an you will see that the PCU/ECU has numerous idle speeds based on countless paramaters. You're experiencing the "cruise idle" that happens sometimes after cruising at highway speeds....
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Old 11-29-2009, 12:19 AM   #7
Captain Coop
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Had the exact problem however mine would idle to almost 1200 RPM. Mine was the APPS and after replacing it that stopped but it would still idle up just a little bit after cruise was engaged for a while or just after running at highway speeds for a while. That is normal. Ive heard that its something to do with all the sensors readjusting and it just takes a second??? but it is normal.
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Old 11-30-2009, 09:08 AM   #8
ted_pulliam
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Thanks everyone. I can live with the high idle for now :-)

Ted
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