Fast Idle 6 speed transmission

[mbadger]

Does anyone know why I can't get the fast idle programed for my 04. 5 Diesel. I have a 6 speed transmission and I am told this can only be done to an automatic. I would think a sensor could tell if my transmission was in neutral if the problem is with fear of it being in grear.

 

[Scooby]

I agree... I have a six speed also. They could make it so that you can't turn it on without the truck have the emergency brake on (instead of it needing to be in "Park")

 

[mbadger]

Yes I do believe there could be a number of ways for us to get one programed in. I guess we can't so I will have my mechanic fix one up for me when I get my ebrake.

 

[artie]

The current idle up code is only for automatic trans is partly due to the fact that it uses the servo controll system that does the speed controll to force the idle into the 1100-1500 range. When I turn off the idle up on my truck after is is set the fuel pedal will come back up to the normal position.

 

[rbattelle]

See, I think this would be so much easier on 6-speed trucks. When I engage my cruise, the fuel pedal doesn't move at all... throttle control is all electronic. It would seem a simple ECM programming change to permit the high idle, but I suspect perhaps it's a legal issue between Cummins and Dodge, since Cummins writes the ECM software and Dodge just interfaces with it. With automatic trucks, if they do have servo-operated cruise, Dodge can just change the Powertrain Computer to apply cruise control at 0 speed without any changes to the Cummins programming. I don't know.



Another option is to buy the high idler from Diesel Services Group at www.dieselservices.com . I'm in the process of installing one now and will review it when I'm finished.



-Ryan

 

[mbadger]

Thanks, I'll talk to my mechanic and see what he says.

 

[abdiver]

Another option is to buy the high idler from Diesel



Please explain to me why it is desirable to have this high Idle



Thanks a newbie to Cummins

 

[rbattelle]

Having a high idler (whatever the brand) is beneficial to avoid a phenomenon sometimes referred to as "stacking". At idle, your fuel/air ratio is extremely lean - sometime like 100:1. That's not enough to generate heat, so the combustion chambers cool down to the point where you're no longer getting a complete fuel burn. When that happens, diesel begins to wash down the cylinder walls (reducing lubrication) and can flow down into the oil sump, where it reduces lubrication to critical engine parts. All this is very bad. To avoid it, you idle the truck up a bit if you're going to leave it running for an extended period of time. It's also good if you want to run things like on board air or if you're jump-starting someone.



Sitting in traffic in the winter in my truck I can literally watch the water temperature drop like a rock. After 5 minutes in the cold at idle I can drop 20 degrees water temperature!



Having said that, there are tons of people who just let them idle; I've heard stories of people idling for over 12 hours without any notable damage. So there's no need to panic about this and start thinking "I've got to get high idle or I'll ruin my truck".



-Ryan

 

[Bill Stockard]

Another option is to buy the high idler from Diesel



Please explain to me why it is desirable to have this high Idle



Thanks a newbie to Cummins

I use a "non-high tech mechanical high idler" on my '03 (wood dowel rod between the seat and the adjustable pedals) to keep our weenie dog cool in the summer when the truck is parked. There's no danger of her knocking the dowel rod loose since she sleeps on her bed on the rear seat and is too old and stiff to get to the front seats.



Bill

 

[mbadger]

Winter/Summer

I live in North Central Montana. In the winter we can get -20 degrees and lower, we leave our rig running to maintain warmth inside our rigs and it isn't good to let your Diesel motor idle at the normal low rpm's. In the Summer we have the other end of the weather spectrum, it gets hot. I would like to be able to run higher rpm's when going into some place for a quick minute so my dogs don't cook.

I went to a site listed in this group of posts and there is one for $439. 00. My mechanic was talking about $100. 00. Won't be as safisticated as the pricer one but will get the job done.

Another option is to buy the high idler from Diesel



Please explain to me why it is desirable to have this high Idle



Thanks a newbie to Cummins

 

[KO_RAM]

I went to a site listed in this group of posts and there is one for $439. 00. My mechanic was talking about $100. 00. Won't be as safisticated as the pricer one but will get the job done.

That's Canada dollars, it's about $350 US. Still pretty pricey

 

[LEPage]

I'm not sure what you are talking about. My '03 6spd. high idles by itself below a preset temp. Are you talking a on-demand high idle?

 

[DBoyd]

Please be careful when leavin the dogs in the truck with the AC running. One of the canine unit cops in Corpus left the dog in the car with the ac on while he did a report or paid a bill or something. Anyway the ac quit and the dog died a rough death with heat stroke in just a few minutes!! Just a quick reminder.

 

[JHardwick]

mine high idles all the time, no matter the weather or operating temp



if I drag the clutch with my foot on the brake, it'll drop back to normal idle

 

[mattymac]

I have heard the most common response being that the ECM doesnt know if the truck is in Nuetral, Park, or in gear with the 6 spds. I think this is bull. If the ECM could see RPM with no MPH reading, and no neutral safety circuit open (clutch pedal out) then why couldnt we send the signal to the ECM for voltage from the pedal via the CC buttons?

 

[TSpecht]

I agree, the lack of the same high idle feature the automatic guys get, for the 6 speed trucks is unacceptable. I think we should flood DC with phone calls demanding this feature be enabled and just use the parking brake as the (probably) necessary interlock. Someone must have a number, I'm not sure I'll find the right one... It's ridiculous to have to pay extra for something they're already making trucks do anyhow.



The fact that the trucks all idle up to 1000 RPM's under certain conditions alone tells us that the system is capable of idling up the engine on demand. Therefore there's absolutely no technical reason we cannot have this feature.

 

[CumminsBu]

I started my truck the other day to go to work, I started the truck put it in netural idling at 750 rpm, ran inside the house for a couple of minutes, went back to my truck and it was idling at 1000 rpms. I pushed the clutch in and it droped to 750 rpms. I didn't plug it in that night and it was around 40 F. No reflashes on the ecm or tsb.

 

[R.M.THOMPSON]

Just thinkinng outside the nine dots here for a moment , has anyone tried to alter signal voltage from the MAP or the outside air temperature sensor ? I wonder what or if these are the only input/s controlling the "low ambient high idle" feature that all trucks are programmed with ? Can someone give it a try,I'll do it ,but it won't be for a week or so until I can get to it. All that may be needed for the test is a resistor and the resistance table for that particular sensor. I'm sure we can come up with a relay bridge to prevent any "code throwing" if the test works(which would probally require pulling the battery leads to swap the sensor for a resistor) page 8m-11 03 service manual states 75f=10. 3k and 86f=7. 57k for the AT sensor. Could'nt find the sequence of ops on the MAP,maybe someone could chime in ?????????

Mark Thompson

 

[mbadger]

Yes. I was given a site that had a pricey one and am considering it. Have a great day. Mike

 

[OCarney]

I had the same experience as MALIBU described. I was in northern Indiana Thursday night, temp was 25-28 degree range, hooked up to a trailer ,left it idling at 750 rpm, went inside to leave my paperwork, when I came back it was idling at 1000 rpm. Didn't think the high idle would work on 6 speeds. BTW, we left the 25-28 degree temps and all the white stuff for the emarald coast of Fl. , temp was 74 with a clear blue sky Saturday afternoon. :-laf