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Old 10-06-2009, 05:39 PM
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High Idle Mods

Do differant years react differantly? I have a 2004 built in Sept 2003 and when I throw my switch it idles up just fine weather or not the parking brake is set. I thought I had read the brake had to be set?
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Old 10-06-2009, 05:41 PM
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03's and early 04's don't have to have parking brake set later ones do. i have an 03 too and thought that same thing so i asked as you are now and that was what i was told.
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Old 10-06-2009, 05:47 PM
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Good deal thanks for the input.
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Old 10-06-2009, 06:14 PM
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My 04 has to have the parking brake set???
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Old 10-06-2009, 08:08 PM
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what is this high idle mod?? sounds like somthing you to rig up on the truck with a switch.. and whats the point..my 05 has a high idle in cold weather..when it gets down in the teens it will run itself up to 1200rpm, this AM was about 40 out..i think when i jumped in it was at about 900.. as soon as i tap the brake pedal it idles down... so my question i guess..if not for faster warm ups..whats the point??
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Old 10-07-2009, 05:19 AM
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I want to get rid of that stupid high idle, sucks the fuel down. How do you do this? can someone send me a link somewhere thanks.
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Old 10-07-2009, 05:26 AM
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As Stoker mentioned, the 6.0 is programmed to high idle when cold and will return to "normal" idle when the brake pedal is tapped. The high idle mod gives you the ability to run up the idle on demand (provided the truck is in park, parking brake is set on newer models, etc.). Why do this? It will prevent wet stacking during extended idles when warm, helps the A/C work more effectively when cooling the cabin on hot days, and increases alternator output if you need to jump start someone.

As far as I know, there's no way of deprogramming the factory high idle.

--Snake
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Old 10-07-2009, 05:33 AM
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dang that sucks, I live in MN and its already high idling in the morning.
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Old 10-07-2009, 08:34 AM
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Quote:
Originally Posted by scha0786 View Post
dang that sucks, I live in MN and its already high idling in the morning.
lol thats a good think you want a warm motor...



my truck is the same no parking brake required. heck i can put it in neutral and hit the switch and it will rev up to 1200rpm...
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Old 10-07-2009, 08:49 AM
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I was just playing with mine. In park no parking brake is needed but in neutral it needs the parking brake. Weird how much these trucks vary from truck to truck.
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