high idle 5.4
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Senior User
Joined: May 2010
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From: Duluth,MN
high idle 5.4
Hi guys been searching and trying to get my truck to be a high idler! I went to the ford fleet page and checked it out and found that with gasser there is no batter charge bcp wire. So I then searched and found that with the orange pto wire I am able to add a resistor to make my idle anywhere I please. Next I went and got a 1k ohm resistor, put it in line and hooked it up using my #4 up-fitter switch. HERE IS MY ISSUE, I only idle at 900 rpm which is the open resistance amount, not the 1440 that I should. Anyone know why? Has anyone tried adding a resistor to there high idle? Help would be great!
This is the resistor page
https://www.fleet.ford.com/truckbbas...bb_pdf/159.pdf
Here is a link to the high idle page
https://www.ford-trucks.com/forums/4...-switches.html
This is the resistor page
https://www.fleet.ford.com/truckbbas...bb_pdf/159.pdf
Here is a link to the high idle page
https://www.ford-trucks.com/forums/4...-switches.html
Hotshot
Joined: Aug 2006
Posts: 17,398
Likes: 317
From: Whittier, CA
Just an idea here - you might try wiring it so that voltage is present through the resistor prior to engaging the upfitter switch. I am guessing you wired the resistor such that it only gets power at the same time the SEIC enable gets power. The PCM might want to see that reference voltage before enabling. Technically, that is how the schematic shows it wired.
That's just a guess, but I notice that on gas engines, once SEIC is disabled (stepping on brake, etc), it will not enable itself. You have to cycle the switch to reenable.
Here is the full document for SEIC operation:
https://www.fleet.ford.com/truckbbas/non-html/Q108.pdf
That's just a guess, but I notice that on gas engines, once SEIC is disabled (stepping on brake, etc), it will not enable itself. You have to cycle the switch to reenable.
Here is the full document for SEIC operation:
https://www.fleet.ford.com/truckbbas/non-html/Q108.pdf
Thread Starter
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Senior User
Joined: May 2010
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From: Duluth,MN
Nope, I seem to get 900 rpm.
I have been doing some more research and I am not the best at wiring diagrams but it seems to me that if I give the 0range wire(pto mode) the Orange/yellow(Pto Rpm) with a 1k ohm resistor and the Orange/white(Pto Engage) voltage. It should ramp up to 1440.
Heres what I tried hooked to up-fitter #4
1.just the orange = (900 rpm)
2.orange and the orange/yellow = (900 rpm)
3.orange and the orange/yellow and orange/white = (650 rpm) Should be ~2300 rpm.
4.orange,resistor then orange/yellow = (900 rpm)
5.orange,orange/white, resistor then orange/yellow = (650 rpm)
Should be 1440 rpm
I broke one resistor and tried another during the testing with no positive results.
Somethings not right.
Heres the diagram to the right
https://www.fleet.ford.com/truckbbas...bb_pdf/159.pdf
Heres the description to the right
https://www.fleet.ford.com/truckbbas...df/155-158.pdf
What am I missing?
I have been doing some more research and I am not the best at wiring diagrams but it seems to me that if I give the 0range wire(pto mode) the Orange/yellow(Pto Rpm) with a 1k ohm resistor and the Orange/white(Pto Engage) voltage. It should ramp up to 1440.
Heres what I tried hooked to up-fitter #4
1.just the orange = (900 rpm)
2.orange and the orange/yellow = (900 rpm)
3.orange and the orange/yellow and orange/white = (650 rpm) Should be ~2300 rpm.
4.orange,resistor then orange/yellow = (900 rpm)
5.orange,orange/white, resistor then orange/yellow = (650 rpm)
Should be 1440 rpm
I broke one resistor and tried another during the testing with no positive results.
Somethings not right.
Heres the diagram to the right
https://www.fleet.ford.com/truckbbas...bb_pdf/159.pdf
Heres the description to the right
https://www.fleet.ford.com/truckbbas...df/155-158.pdf
What am I missing?
Hotshot
Joined: Aug 2006
Posts: 17,398
Likes: 317
From: Whittier, CA
I don't think you are following me. Find a wire that is hot 12V whenever the ignition is on. I'm not sure what color, just find one on the fuse block. Wire that directly to the Orange/Yellow, with no resistor. Then wire your upfitter to the Orange wire. If my theory is correct, that should give you 2320 RPM. If it does, then cut the input to the Orange/Yellow and splice in your resistor.
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Senior User
Joined: May 2010
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From: Duluth,MN
We must have posted at the same time
Can I leave this wire with 12 volts on it all the time?
Also in the info you gave me if you read the pto rpm section it says
• Add a resistor or potentiometer to obtain fixed or variable engine target speed.
• Combine in circuit with PTO-ENGAGE.
• Speed range available: 910 rpm to 2400 rpm
So I also need to energize the PTO-ENGAGE wire right?
Can that wire be left with 12v on it all the time?
Just an idea here - you might try wiring it so that voltage is present through the resistor prior to engaging the upfitter switch. I am guessing you wired the resistor such that it only gets power at the same time the SEIC enable gets power. The PCM might want to see that reference voltage before enabling. Technically, that is how the schematic shows it wired.
Also in the info you gave me if you read the pto rpm section it says
• Add a resistor or potentiometer to obtain fixed or variable engine target speed.
• Combine in circuit with PTO-ENGAGE.
• Speed range available: 910 rpm to 2400 rpm
So I also need to energize the PTO-ENGAGE wire right?
Can that wire be left with 12v on it all the time?
Thread Starter
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Senior User
Joined: May 2010
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From: Duluth,MN
Sorry posting at the same time again! I'll give it a try what about the pto engagement wire?
I read this under the engagement wire section.
• Applying vehicle battery voltage to this wire signals PCM that the PTO load is being
applied.
• Must be applied after PTO_Mode, and after PTO_Indicator changes to "ground".
• Also used to complete the resistor circuit for engine speed selection.
I read this under the engagement wire section.
• Applying vehicle battery voltage to this wire signals PCM that the PTO load is being
applied.
• Must be applied after PTO_Mode, and after PTO_Indicator changes to "ground".
• Also used to complete the resistor circuit for engine speed selection.
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Hotshot
Joined: Aug 2006
Posts: 17,398
Likes: 317
From: Whittier, CA
Apparently so. That is what the schematic shows for the gas engine.
I don't think you need that one, but not positive. I think that just is used if you have a PTO to tell the system that a load is being applied.
I don't think you need that one, but not positive. I think that just is used if you have a PTO to tell the system that a load is being applied.
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Hotshot
Joined: Aug 2006
Posts: 17,398
Likes: 317
From: Whittier, CA
Notice on the gas engine schematic that they do not show a pot option, only a fixed resistor. On the diesel schematic, it shows an optional pot or resistor. Using a pot would give you a realtime variable RPM. It seems that the gas engine cannot be varied realtime. That is another reason why I think the reference voltage needs to be present at all times on the gasser.
Thread Starter
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Senior User
Joined: May 2010
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From: Duluth,MN
Alright I was out side and man its cold!!!!!
I tried to hook up the orange/yellow to up-fitter #2 turned it on a minute before flipping the seic upfitter and still only get 900 rpm.
Then I tried wiring both the orange/yellow and the orange/white together on up-fitter #2 waited a minute turned on the seic up-fitter and I only get 650 rpm.
Any other ideas?
I tried to hook up the orange/yellow to up-fitter #2 turned it on a minute before flipping the seic upfitter and still only get 900 rpm.
Then I tried wiring both the orange/yellow and the orange/white together on up-fitter #2 waited a minute turned on the seic up-fitter and I only get 650 rpm.
Any other ideas?
Thread Starter
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Senior User
Joined: May 2010
Posts: 301
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From: Duluth,MN
Man don't do this to me 900 rpm is a joke!!!! I would like it to idle up for jumping equipment and for running power camping and well other stuff!!!
Anybody!!!!
Thanks again bill!!
Anybody!!!!
Thanks again bill!!
Hotshot
Joined: Aug 2006
Posts: 17,398
Likes: 317
From: Whittier, CA
Well, if you want to try my silly ideas some more...
Look at this paragraph under PTO_Engage (Orange/White)
Must be applied after PTO_Mode, and after PTO_Indicator changes to "ground".
So, maybe try a 3rd upfitter for the Orange/White wire. Engage this switch last.
Look at this paragraph under PTO_Engage (Orange/White)
Must be applied after PTO_Mode, and after PTO_Indicator changes to "ground".
So, maybe try a 3rd upfitter for the Orange/White wire. Engage this switch last.
Hotshot
Joined: Aug 2006
Posts: 17,398
Likes: 317
From: Whittier, CA
In other words:
Wire a constant 12V wire to Orange
Wire a constant 12V wire through a resistor to Orange/Yellow
Wire an upfitter to Orange/White
If you wire the first two lines above to an upfitter, leave that upfitter turned on before you start the engine. Then after running, turn on the upfitter to the last line.
Wire a constant 12V wire to Orange
Wire a constant 12V wire through a resistor to Orange/Yellow
Wire an upfitter to Orange/White
If you wire the first two lines above to an upfitter, leave that upfitter turned on before you start the engine. Then after running, turn on the upfitter to the last line.