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  #1  
Old 10-14-2011, 06:18 PM
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High idle mod without upfitters?

I have a 2005 6.0 and want to do the high idle mod but don't have upfitters. I have a toggle switch but can't find a good write up that doesn't use upfitters. Thanks.
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Old 10-14-2011, 06:25 PM
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Just take the upfitter switch part of the equation out and replace it with any switch and a power source.

On earlier (like mine) models, there was a fused hot in run wire coming out of the wiring bundle that goes to the OBD-II port. Find that wire, run it through your switch and then into either the PTO or BCP wire, as you prefer.
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Old 10-14-2011, 06:26 PM
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If you have found the wires then just connect them to the switch can be mounted anywhere.
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Old 10-14-2011, 06:35 PM
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What is tje purpose of the hi idle mod. I mean. I know it idles the motor up, but what's the reason for doin it ??
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Old 10-14-2011, 06:37 PM
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Quote:
Originally Posted by htcman74 View Post
I have a 2005 6.0 and want to do the high idle mod but don't have upfitters. I have a toggle switch but can't find a good write up that doesn't use upfitters. Thanks.
From a couple of threads down today:

http://www.ford-trucks.com/forums/11...-idle-mod.html

And if you want to get really fancy:

Riffraff Diesel: Riffraff Custom Auto Dash Kit
Quote:
Originally Posted by 05 f250 6 inch lift View Post
What is tje purpose of the hi idle mod. I mean. I know it idles the motor up, but what's the reason for doin it ??
Wet stacking if you don't have a "high idle" mod on your truck. At idle the 6.0L can over-cool it's self...thus not all the fuel injected "burns off" (you need compression & heat to burn diesel). Thus the fuel will condense and work it's way past the piston rings and into the lube oil....diluting the oil and wreaking havoc with your lube oil system. Without having a high-idle mod your going to have to think about hold your foot on the throttle/go-pedal to keep the RPM around 1200 to keep the all the fuel burning.
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Old 10-14-2011, 06:43 PM
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05F2506" its to keep the motor from wet stacking , at slow idle it doesn't have complete combustion so the unburnt fuel will run down cylinder walls in to oil . High idle complete combustion.
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Old 10-14-2011, 06:44 PM
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Quote:
Originally Posted by 05 f250 6 inch lift View Post
What is tje purpose of the hi idle mod. I mean. I know it idles the motor up, but what's the reason for doin it ??
It's original intent was for PTO operations. But you can use the high idle mod to help mitigate some of the issues of extended idle. A faster idle will help keep the heater hot, or the a/c cooler, when idling also. And it can maintain the battery charge better if you're using a winch or lots of lights or something.

On 03 and 04 models there is just the PTO wire, which idles the engine to 1200 RPM and locks the torque converter (on automatics). On 05 and up engines, there are more options. You can use the PTO wire that works like above, or the BCP (Battery Charge Protect) wire, which will idle up to 1200 RPM, then increase idle over that if the battery voltage drops. There is also an option to wire in a fixed or variable resistor to vary the high idle RPM from 1200 to 2400 RPM.
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Old 10-14-2011, 06:46 PM
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Zhilton. Thanks for that explanation. I never understood why high idle mod was needed but I do now. Adding it to my list of things to do to my truck.
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Old 10-14-2011, 06:51 PM
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Don't know about other years, in my 2003 it is part of the programming for cold starts.
On a cold morning after a minute or so it'll idle high.
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Old 10-14-2011, 06:53 PM
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All models will idle up some when the oil or coolant are below a preset value. But it only runs up to about 8-900 RPM and it'll idle down as soon as it warms up enough. The high idle mod forces it to 1200 RPM and it stays there.
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Old 10-14-2011, 07:06 PM
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Quote:
Originally Posted by dchamberlain View Post
All models will idle up some when the oil or coolant are below a preset value. But it only runs up to about 8-900 RPM and it'll idle down as soon as it warms up enough. The high idle mod forces it to 1200 RPM and it stays there.
Doesn't it take an ambient air temperature below 40F and oil/coolant below a set temperature before the PCM will idle it up?
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Old 10-14-2011, 07:11 PM
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I have an 05 and all I did was lengthened the orange PTO wire ran it to ignition hot on fuse panel. This way as soon as I push the e-brake down it idles up to 1200rpm. Sucks when you try to use ebrake for other purposes, but I have have gotten use to not using it for much else than a switch itself. Works great
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Old 10-14-2011, 08:07 PM
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Quote:
Originally Posted by zhilton View Post
Doesn't it take an ambient air temperature below 40F and oil/coolant below a set temperature before the PCM will idle it up?
This is what the 2004 Service Manual says. I don't know if it changed in later years.

Quote:
COLD IDLE KICKER

Cold idle kicker provides an increase in idle speed during cold engine warm up, of up to 1100 RPM (normally 725 RPM for manual, 650 RPM for auto), for a faster warm-up to operating temperature during extended idle conditions. This is accomplished by the PCM, which monitors the EOT sensor input and adjusts the RPM accordingly, to a maximum of 1100 RPM .

The idle speed is increased proportionately when the engine oil temperature is below 70°C (158°F) and the engine has been at idle for more than 2 minutes . Applying the brake pedal, clutch or accelerator pedal will deactivate the cold idle kicker and return the idle speed to 650 RPM .
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Old 04-01-2014, 07:40 PM
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Originally Posted by wulfman View Post
05F2506" its to keep the motor from wet stacking , at slow idle it doesn't have complete combustion so the unburnt fuel will run down cylinder walls in to oil . High idle complete combustion.
Hey guys, I'm no expert but I have been around diesels for a while now and worked on them in the Air Force. Wet stacking is not the above. Wet stacking is the incomplete combustion of fuel oil that makes it past the combustion chamber and into the exhaust manifold where it collects up in the "exhaust stacks" due to low engine combustion and exhaust temps. You can identify a "wet stacked" vehicle when cold starting results in a large plume of puffy white/blue smoke that looks like someone popped a smoke grenade. Since the cylinder pressure is higher in the combustion chamber during the compression stroke than in the engine oil chamber fuel could feasibly make it into the oil in a very worn engine. The opposite of this condition is called diesel run-away when an engine remains fueled by pulling oil from the engine oil chamber into the combustion chamber on the "suck" intake stroke past the worn out piston sleeves and rings and continues to accelerate despite having been de-fueled by the operator. The only way to stop this condition before engine failure is to starve the air intake from the engine compartment.

The wet stacking condition is possible due to the way Diesel engines open their "exhaust valves" at the bottom of their combustion stoke when the exhaust ports are opened by the piston traveling down past them at the very bottom of the stroke. The ports are at the bottom of the cylinder where unburnt fuel collects and drains down into the exhaust manifold and collects there. This can only happen when there is incomplete fuel combustion and the exhaust temperatures are too low to burn or evaporate the fuel off faster than it is collecting like a "puddle" in the lowest part of the exhaust system.
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Old 04-01-2014, 08:07 PM
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