the truck has the auto high-idle function enabled from the factory. in severe cold temperatures, the engine idle will increase to 1100rpm until the parking brake is released or the brake pedal depressed. what everyone else is talking about it the manual high-idle. with this feature enabled, you can manually engage the high idle in 50rpm increments from 1100rpm to 1500rpm by using the cruise control buttons. This way you can engage the high idle at any outside air temperature and for as long as you like.

 

I start mine up dead cold, hit the e-brake and then the high idle to warm it up. Happens immediately and no delay first thing in the morning.

 

How do you ground the wire on a truck with a Manuel Trans?

 

I wonder if it's an either /or thing then, having more to do with temperature. I know mine won't engage right off in cold weather, but then we're talking a whole different world of cold I would think

 

previous post, different thread:

"you don't need any extra parts to enable the high idle on a manual trans!! i did mine and have posted how to do it before (on other forums). you need to have the dealer enable it, just like on the auto trans. the only other step is to ground the one wire. the wire is located on the firewall. driver side, far left bottom firewall. basically if you go staight back from the emergency brake handle to the firewall, you'll see a large wire harness, white in color. you can unhook that harness, and behind it there is a very short (4 inches maybe) dark green wire coming through the firewall. the wire has a heatshrink cap on the end. strip the end of the wire and ground it to one of the two bolts next to the harness. that's it! let me know if you need more info. you'll need your flashlight to see that little wire back there. that's it folks no money on any parts. that wire is for the optional clutch safety switch. it is really not needed, as the transmission has to be in neutral and the emergency brake set, in order for the high idle to activate. if you touch the brake pedal, release the emergency brake or put it in gear, the high idle will disengage."

 

is the purpose of the high idle to heat up your motor for cold weather? you guys are not talking specifically about just adding a cruise control right?

i have a 06 big horn 4x4.... would mine have this already or would i need it enabled?

 

I have asked my dealer several times about enabling the high idle option on my 08 truck. They tell that with the newer flashes, their software has been upgraded...or something like that...and that the high idle option is no longer available to them. They say that they've checked into going back to a previous level, where the high idle was still in the software, and that isn't possible. Could someone with technical expertise...like a Dodge tech...answer this? Is it possible that since they're up to the av and am (or whatever) flashes that the option no longer exists?

 

Thanks Bob,

Is that also the process for the '07 with 5.9l?

 

Is the high idle available on the 08' 6.7L ???

 

Daddy,

It has been available on all Dodge Cummins trucks since at least 2005. I believe that the feature has been build into the Cummis ECM for far longer than that but I don't know if it's been supported by Dodge or not.

 

Yes i picked up my 08 6.7 in middle of dec. 07 first thing i asked was to enable the high idle. They did this, no charge as i made it part of the buying agreement. But yes it is there for the 6.7 08's.

 

It's not like I really need it here in Houston but on hunting trips up north it sure would be nice to have.

Thanks!!

 

It's nice to have down here in the summertime too. Kick the high idle on and the A/C will get your truck about 5* cooler and the blower motor will blow harder as well. That, to me, is all the reason in the world to have it engaged!

 

My dealer enabled my high idle feature without any mention of it from me. I have had a number of injector issues, some of them they blame on excessive idle time. I tow a fiver rv so sometimes idle more than I'd like. They said it will foul the injectors. So they enabled the high idle for me to use in those applications. I like it and truck seems to be running good.

 

while it is nice to have faster heat in the winter, and colder a/c in the summer, those are just added benefits of the high idle. the real reasons for having it are far more important than those. it's to run equipment off of the PTO, and to prevent "wetstacking" (unburned fuel and carbon deposits) from low rpm idleing. prolonged low rpm idle times are just trouble, especially with the new restricted motors.