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6.4L Power Stroke Engine and Drivetrain Discussion of the 6.4L Power Stroke diesel engine and drivetrain in the 2008-Up Super Duty trucks. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 6.4L Power Stroke engine.

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Old 08-18-2007, 11:12 PM   #1 (permalink)
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High idle

I'm getting my '08 and want to setup the high idle like my '06.

I understand that the conductor color has changed. Does any one have the wiring diagram for the '08 high idle?


Thanks..
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Old 08-18-2007, 11:18 PM   #2 (permalink)
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Re: High idle

there is another post talking about it... http://forums.thedieselstop.com/ubbthrea...part=2&vc=1
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Old 08-19-2007, 10:31 AM   #3 (permalink)
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Re: High idle

Here is the FORD link to the latest 2008 SEIC wiring. 2008 SEIC Document

Here is a photo of the 2008 upfitter switches diagram if you need it.

2008 Upfitter Switches
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Old 08-19-2007, 10:48 AM   #4 (permalink)
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Re: High idle

Thanks guys!! Good info..

Do you know if the ampere values have changed between switch positions?

Which are 30A vs 10A?
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Old 08-19-2007, 10:55 AM   #5 (permalink)
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Re: High idle

On an 08,
1 = 30A
2 = 30A
3 = 10A
4 = 15A
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Old 08-21-2007, 07:38 PM   #6 (permalink)
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Re: High idle

I just read of somebody using the BCP wire instead of the PTO for SEIC. Does it matter which you use since they both increase the RPMs? I don't think BCP locks the torque converter. Jeremy
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Old 08-21-2007, 09:11 PM   #7 (permalink)
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Re: High idle

You're right about the difference in the torque converter, where one locks and one does not. (PTO locks it.) In the reading, they claim the BCP raises idle to 1200rpm, same as PTO. (Or I THINK thats what I remember reading.) In my experience with both, BCP stays at around 900rpm and PTO is at 1200rpm (with no resistor modification). BCP will vary the idle speed automatically depending on electrical load. If you cold-start the truck and immediately flip the BCP on, it may go to a higher RPM initially, but usually backs down to the 900rpm (with no other electrical load). I like having both, depending on why I want high idle. If I were just doing it for the higher engine speed to prevent idle-associated problems, I'd probably do the PTO wire. My $.02 anyway.
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