Need a high idle switch

[Tyler_h]

Hi friends,
My truck has the big alternator from Factory and I would like to utilize the output a little more effectively at idle. The truck has additional electronics for offroad use such as additional lights, a winch and 2nd battery.

I would like to be able to put the truck into 'charging mode' by lifting up the idle speed temporarily with a switch to around 1500-1700rpm. Eventually I would like to change out the alternator pulley to make it spin faster.

Searching around for any pre existing kits didnt yield any information so I'm assuming I'll need a potentiometer or some resistors to adjust the voltage from the 'gas peddal' to the computer.

Has anyone ever done something like this, have a schemarice for throttle control or have any general feedback/advise on this project?

Thank you

 

[SD28]

Did you ever figure this out? I’m currently trying to find a solution to the same. Thanks

 

[DA67Goatman]

Adjustable length stick on the throttle pedal?

 

[Wild one]

Did you ever figure this out? I’m currently trying to find a solution to the same. Thanks

The only way to up the idle rpm,other then the adjustable stick,is tune it.Being a 20 your trucks expensive to tune,you need an unlocked PCM / HP's bypass cable and tuner

 

[DA67Goatman]

I have also heard of using a fixed length stick and the slide the power seat forward against the pedal to set the idle up. I figured I throw out another option.

 

[tjfdesmo]

Lisle Tools 48700

Amazon.com

 

[R.D.J.]

I was wanting the exact same thing, for similar reasons. Im pretty versed in auto electronics, but I just couldnt find a way to make it work well with the factory cruise buttons without having to create another module which could control it.

I went completely analog, but I didn't want any prop rod in the cab or visible mechanisms.

Works OK. Not great, and not bad. It could definitely be perfected. The thread pitch seems too course at times, and too fine in others. It works for what I want to do with it. I use it as more of an adjustable stop, than use it to adjust the pedal. Set desired engine speed with your foot, and set the stop against the pedal. Unthread it when done. Cant see it unless looking low under the dash, but can find it with your hand easily. It took some figuring to make work with the adjustable pedal system.

Its just a bent piece of flat stock, a hole drilled in it, with a flange nut tack welded on the firewall side. Some threaded rod and a spring to keep it from rattling, with a small knob welded to the end. The factory holes and bolts for the APPS hold it in place between APPS and bracket.

 

[Wild one]

I was wanting the exact same thing, for similar reasons. Im pretty versed in auto electronics, but I just couldnt find a way to make it work well with the factory cruise buttons without having to create another module which could control it.

I went completely analog, but I didn't want any prop rod in the cab or visible mechanisms.

Works OK. Not great, and not bad. It could definitely be perfected. The thread pitch seems too course at times, and too fine in others. It works for what I want to do with it. I use it as more of an adjustable stop, than use it to adjust the pedal. Set desired engine speed with your foot, and set the stop against the pedal. Unthread it when done. Cant see it unless looking low under the dash, but can find it with your hand easily. It took some figuring to make work with the adjustable pedal system.

Its just a bent piece of flat stock, a hole drilled in it, with a flange nut tack welded on the firewall side. Some threaded rod and a spring to keep it from rattling, with a small knob welded to the end. The factory holes and bolts for the APPS hold it in place between APPS and bracket.

My hats off to you RDJ,that's a hell'va an idea

 

[diymirage]

I wonder if you could get a little silly-noid hooked up that will created a vacuum leak when you push a button?

That might bump the idle

 

[04fxdwgi]

Would make for an interesting "idle hours" reading in the PCU

 

[R.D.J.]

My hats off to you RDJ,that's a hell'va an idea

Thank you.

Normally Id like to do something a bit fancier. Its the only thing on my truck where I'd consider it "good enough", and that kind of bothers me.

I was thinking of making an adjustable PWM solenoid that can be easily adjusted. Again, this would be so much nicer to use the software already built into the truck, but software isn't my strongest area.

 

[Wild one]

Thank you.

Normally Id like to do something a bit fancier. Its the only thing on my truck where I'd consider it "good enough", and that kind of bothers me.

I was thinking of making an adjustable PWM solenoid that can be easily adjusted. Again, this would be so much nicer to use the software already built into the truck, but software isn't my strongest area.

What about a small linear actuator on a momentary DPDT rocker switch.
I use a pair of these to open and close the active exhaust on my 300.It never had active exhaust originally ,but i put the later model 2.75" Hellcat exhaust on it,and it was to loud with the valves open for around town,so i just built some brackets and bearing plates to open and close them,and use a momentary rocker switch to open/close the valves.I was way to cheap to buy the factory exhaust modules at about a $1,000 each in Canada then wire them in and hope a rocker switch would control them,lol

Amazon.com

Amazon.com : remote control for small 12 volt linear actuators

Amazon.com : small 12 volt linear actuators

These actuators can be had in short enough stroke lengths ,to move the pedal far enough for a high idle,but not far enough, that you didn't have to much pedal travel if something was to go wrong,and hold the pedal down to far to cause issues.You can even wire them to a remote switch,so you could remote start the truck from a distance and still up the idle rpm with-out having to be in the truck.

Amazon.com

Amazon.com

 

[R.D.J.]

Id thought about something like that as well, but it would have to be a very very slow actuator (which I'm aware exists). The pedal is very sensitive that close to the fulcrum. It shows in the analog version I've made.

Maybe on the next design I'll incorporate something like that. Thanks!

 

[Wild one]

Id thought about something like that as well, but it would have to be a very very slow actuator (which I'm aware exists). The pedal is very sensitive that close to the fulcrum. It shows in the analog version I've made.

Maybe on the next design I'll incorporate something like that. Thanks!

How much do you need to move the pedal to bump the rpm to somewhere around 750,is it more or less then a 1/2 inch,as i was thinking you could build it so at full actuator extension the idle would end up where you wanted
The ones i used on my exhaust take roughly 4.5 seconds to go from open to close,that's the 2" versions,i wished they were quicker,lol. It looks like the short ones with under an inch of travel would probably be somewhere around 2 to 4 seconds,which should be slow enough for a pedal.I don't have anything that needs a idle bump,otherwise i'd probably look into building something like your set-up using an actuator.Hopefully somebody takes the idea and runs with it,as i think you have a hell'va idea RDJ,that should be investigated a bit further.

 

[R.D.J.]

With the actuator being so close to the fulcrum, small small adjustments make a big difference. If I used the threaded rod to move the pedal, it overshoots all the time. There is no "sticktion" in the APPS, its quite touchy. With your foot being a good bit of distance away, its far less touchy, and easier to press.

 

[Wild one]

With the actuator being so close to the fulcrum, small small adjustments make a big difference. If I used the threaded rod to move the pedal, it overshoots all the time. There is no "sticktion" in the APPS, its quite touchy. With your foot being a good bit of distance away, its far less touchy, and easier to press.

That's why i think you'd want to build it so the actuator was set to give you the rpm you wanted at full actuator travel

 

[Badger 13]

What do wrecker manufactures do for the idle up when the PTO pump is engaged ? A lot of the light duty and some medium duty tow trucks have gas engines, so they must have some way of controlling RPM's during winching operations.

 

[Wild one]

What do wrecker manufactures do for the idle up when the PTO pump is engaged ? A lot of the light duty and some medium duty tow trucks have gas engines, so they must have some way of controlling RPM's during winching operations.

The heavy duty trucks i think have the ability to up the idle rpm using the steering wheel buttons,but none of the 1500's have that ability.


Yes, the idle RPM on a Ram 2500 with the 6.4L Hemi engine can be increased, but it's not a standard adjustment. It's typically done through the vehicle's "high idle" feature or by using a tuner. The high idle feature, if available, can be activated using the cruise control and SET/ - buttons, while tuning involves modifying the engine's computer settings.

Methods for Increasing Idle RPM:

1. 1. High Idle Feature (If Available):
   • Some Ram 2500 models, particularly Chassis Cab versions, have a built-in high idle feature activated via the cruise control system.
     
     
   • To enable it, turn on the cruise control, press the "SET-" button, and the idle speed will increase to around 900 or 1100 RPM, depending on the vehicle.
     
     
   • This feature is often used to warm up the engine, increase alternator output, or provide more power to aftermarket accessories like PTOs.
     
2. 2. Tuning:
   • Tuning involves using specialized software and hardware to modify the engine's computer settings, including the idle speed.
     
     
   • This method allows for more precise control over the idle RPM, potentially reaching higher speeds than the high idle feature allows.
     
     
   • Tuning can also unlock other features and performance enhancements.
     
     
   • However, it's important to note that tuning can void the vehicle's warranty and may require professional installation.

 

[Dean2]

These guys make the high idle kits you are looking for.

Products-2 | Vehicle Control Systems by InterMotive

Vehicle Control Systems | Products-2

intermotive.net

Standard kit includes single OBDII datalink harness
Ram 1500, 3.6L Engine (2017-2019)

• E-AFIS706VSX-BP | Up to 3 programmable speeds; AC auto trigger off
• E-AFIS707VSX-BP | 1 programmable speed; AC auto trigger on

Ram 2500-5500, 5.7L Hemi Engine (2015-2017)

• A-AFIS706VSX-B | Up to 3 programmable speeds; AC auto trigger off

Ram 2500-5500, 6.4L/6.7L Engine (2013-2017)

• A-AFIS706VSX-B | Up to 3 programmable speeds; AC auto trigger off
• A-AFIS707VSX-B | 1 programmable speed; AC auto trigger on

Ram 2500-5500, 6.4L Engine (2018-2022)

• E-AFIS706VSX-BP | Up to 3 programmable speeds; AC auto trigger off
• E-AFIS707VSX-BP | 1 programmable speed; AC auto trigger on

Ram 2500-5500, 6.7L Engine (2018-2024)

• E-AFIS706VSX-BP | Up to 3 programmable speeds; AC auto trigger off
• E-AFIS707VSX-BP | 1 programmable speed; AC auto trigger on

Ram ProMaster, 3.6L Gas Engine (2013-2019)

• A-AFIS730VSX-B | Up to 3 programmable speeds; AC auto trigger off
• A-AFIS732VSX-B | 1 programmable speed; AC auto trigger on

Ram ProMaster, 3.6L Gas Engine (2020-2021)

• C-AFIS730VSX-BP | Up to 3 programmable speeds; AC auto trigger off
• C-AFIS732VSX-BP | 1 programmable speed; AC auto trigger on

Ram ProMaster, 3.6L Gas Engine (2022)

• C-AFIS733VSX-BP | Up to 3 programmable speeds; AC auto trigger off
• C-AFIS734VSX-BP | 1 programmable speed; AC auto trigger on

 

[Wild one]

These guys make the high idle kits you are looking for.

Products-2 | Vehicle Control Systems by InterMotive

Vehicle Control Systems | Products-2

intermotive.net

Standard kit includes single OBDII datalink harness
Ram 1500, 3.6L Engine (2017-2019)

• E-AFIS706VSX-BP | Up to 3 programmable speeds; AC auto trigger off
• E-AFIS707VSX-BP | 1 programmable speed; AC auto trigger on

Ram 2500-5500, 5.7L Hemi Engine (2015-2017)

• A-AFIS706VSX-B | Up to 3 programmable speeds; AC auto trigger off

Ram 2500-5500, 6.4L/6.7L Engine (2013-2017)

• A-AFIS706VSX-B | Up to 3 programmable speeds; AC auto trigger off
• A-AFIS707VSX-B | 1 programmable speed; AC auto trigger on

Ram 2500-5500, 6.4L Engine (2018-2022)

• E-AFIS706VSX-BP | Up to 3 programmable speeds; AC auto trigger off
• E-AFIS707VSX-BP | 1 programmable speed; AC auto trigger on

Ram 2500-5500, 6.7L Engine (2018-2024)

• E-AFIS706VSX-BP | Up to 3 programmable speeds; AC auto trigger off
• E-AFIS707VSX-BP | 1 programmable speed; AC auto trigger on

Ram ProMaster, 3.6L Gas Engine (2013-2019)

• A-AFIS730VSX-B | Up to 3 programmable speeds; AC auto trigger off
• A-AFIS732VSX-B | 1 programmable speed; AC auto trigger on

Ram ProMaster, 3.6L Gas Engine (2020-2021)

• C-AFIS730VSX-BP | Up to 3 programmable speeds; AC auto trigger off
• C-AFIS732VSX-BP | 1 programmable speed; AC auto trigger on

Ram ProMaster, 3.6L Gas Engine (2022)

• C-AFIS733VSX-BP | Up to 3 programmable speeds; AC auto trigger off
• C-AFIS734VSX-BP | 1 programmable speed; AC auto trigger on

Looks like it only works on a 17 to 19 3.6 truck,i didn't find anything for the 5.7 equipped 1500's on their site.