Factory High Idle Flash? - Ford Powerstroke Diesel Forum

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post #1 of 11 Old 03-15-2007, 06:08 AM Thread Starter
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Factory High Idle Flash?

It was a little cool (14F) this AM and I fired the truck up while I was scraping the windows off. After about 2 mins, the truck automatically idled up to about 1200rpm until I was ready to leave and stepped on the brake. This must be something in the flash as there are no switches or anything that I had to engage to make this happen. I like.
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post #2 of 11 Old 03-15-2007, 06:20 AM
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My '05 did the same thing from the first day I got it.
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post #3 of 11 Old 03-15-2007, 06:23 AM
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Mine too...
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post #4 of 11 Old 03-15-2007, 06:25 AM
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They will all do that in cold temps. It won't do it when it gets warmer into the 40s.

2003 6.0 F350 dually on high cholesterol fuel (WVO)
2000 7.3 Excursion also on a high cholesterol fuel



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post #5 of 11 Old 03-15-2007, 06:48 AM Thread Starter
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I was unaware that they all did this. I keep reading about guys that rig a switch so they can get it to high idle - I thought it was something I was going to have to try. Thanks for the info.
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post #6 of 11 Old 03-15-2007, 06:52 AM
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The switch to idle it up will bring it up to PTO operation speed or 1200 rpm...the cold weather idle your talking about only brings it to about 900 if i remember and like i said, it will only idle it up in the cold weather IF the truck is cold...when the truck has warmed up after driving it, and you stop and idle, it won't idle back up again normally.
I have the hight idle switch mod and like it...i use it alot.

2003 6.0 F350 dually on high cholesterol fuel (WVO)
2000 7.3 Excursion also on a high cholesterol fuel



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post #7 of 11 Old 03-15-2007, 06:53 AM
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The high idle mod linked to switch will positively raise the idle to 1200 rpm. The automatic idle feature may or may not work. It usually sets the idle at 1000 but you never know when it will kick in.

I like having the high idle on a switch so even in warmer temps I don't have to let it sit there and choke up the EGR valve at 600 rpm.
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post #8 of 11 Old 03-15-2007, 07:21 AM
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Over the last couple weeks, when it was cold my truck would idle up for about a min or two, and then go down to normal for a couple mins and then idle back up for another min or two and then back down, etc, etc, etc ... It would do that continuosly until I got in to drive off. The dealer said it was just doing it because , it was reaching its desired temp. But in the past like the first 2-2 1/2 months of winter, it would idle up and stay there until I tapped the brake. Anyways hopefully I'll get the High Idle mod done this spring.

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post #9 of 11 Old 03-15-2007, 07:25 AM
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It's literally a 10-15 minute mod. This is especially true if you've seen the write-up on it. The hardest part is pulling the fuse box.

Actually, I guess this is only true if you have the upfitter switches.
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post #10 of 11 Old 03-15-2007, 07:41 AM
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Quote:
Originally Posted by 720Deere View Post
It's literally a 10-15 minute mod.
I think it took me 5 minutes...i couldn't believe how easy it was.

2003 6.0 F350 dually on high cholesterol fuel (WVO)
2000 7.3 Excursion also on a high cholesterol fuel



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