2011 won't idle up in the cold - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 8 (permalink) Old 01-13-2011, 04:00 PM Thread Starter
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2011 won't idle up in the cold

Hey Guys, my new 2011 F350 starts up in the morning goes to fast idle for about 15 min and that then that is it. The thing slows back down to normal idle speed and stays there for the day. Engine temp is ice cold and won't warm up. Anyone else have an issue like this? -33C outside temp and the rad covered over.


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post #2 of 8 (permalink) Old 01-19-2011, 02:59 AM
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the primary factor for the fast idle has been the oil temp although other thing play into it as well. once it decides its not frozen solid it slows down. i think the boys have figured out how to jimmy it to have a fast idle whenever you want it. since i am still in 6.0 country i havent looked at the details myself.

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post #3 of 8 (permalink) Old 01-21-2011, 12:23 AM
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From what I have read it is as simple as installing a resistor. I am planning on added it when it gets a little warmer.


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post #4 of 8 (permalink) Old 01-21-2011, 02:34 AM
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I tried to connect my pto idle to my #4 upfitter switch, like I had it on my 08 but no sucess. I even went off the ford upfit wiring diagram.

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post #5 of 8 (permalink) Old 01-21-2011, 03:19 AM
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i heard you need a reho stat or risister installed to make it work on the 11's like you could do to the 03-10's

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post #6 of 8 (permalink) Old 01-26-2011, 11:57 PM
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i have it wired, it works.
cant remember the diagram. think my resistor is a 22k and makes for 1200 rpm.
ill find the link for it in a second

here ya go. http://www.thedieselstop.com/forums/...ctures-268611/
i wired mine with a 20k ohm resistor to get 1200 rpm

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post #7 of 8 (permalink) Old 01-29-2011, 03:05 AM
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on the chevy's there is a way to turn on and off the fast idle feature in the DIC (computer)... I'm sure the Ford has the same deal with that fancy color computer... check your menus.

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post #8 of 8 (permalink) Old 01-29-2011, 04:15 PM
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Here are the resistor options. FWIW my local Ford Diesel Tech recommends 1200 RPM under no load. So that would be a 20K resistor. I used a .5 Watt Resistor in my testing.



This is the potentiometer I used:

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Last edited by Rutcutter; 01-29-2011 at 04:23 PM.
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