I started the truck this am, ( keep it inside no heat yet ) -7 celsius in the garage or 19.5 F, anyway, after the preheater did it's thing after the truck was ideling for about a minute, it sped up to about 1100rpm, and stayed there. I had to move it out of the garage and as soon as I hit the brake the CTD slowed back down. I moved it and let it sit idling while I went in the house for a cup a Joe , and just when I was coming back out I heard it speed up to about 1100rpm again, I though coool a auto idle up feature.
So I did not think any more of it and drove off, about a 1/2 hour later I stopped for fuel ( engine and temp ) I left in running while I fueled up and again the idle sped up only for about 30 seconds , then it slowed back down to normal idle speed.

Anyone else getting this, this is the 2007 5.9 , with the new " NETWORKED SYSTEMS" ( what ever that means ).

Ralph

 

My '06 is the same way but it just doesnt start to idle up for about 3 min. I have some scheduled maintenance here this week and I was going to have them "turn on" the man. idle up as I think you can increase the idle greater than 1100.

That combined with a cold front grille insert should keep my wife from loosing fillings durirng thy usual 10 minute drive before she really starts to make heat!

 

I think it is mad because you left it home when you went on your trip.

 

LMAO !!!!!

Yeah, I think your right !!!

King, I remember someone here saying that the high idle feature will kick in every time that your temp drops below a certain temp. I could have it wrong, but I think that's how it worked. Jake was saying that the temp drops off again after sitting for a few minutes. Perhaps it was cold enough for your tempto drop low enough for the idle thing to kick back on? I dunno, I don't have the feature, but I'm pretty sure that's how it went.

 

Yes Hiloram is probably correct and how can you argue that one ?

I doo recall someone mentioning it, I just found it odd that it would kick back in again once it was up to temp .

Ralph

 

That's the thing. Apparently if it's cold enough outside just because the engine is running it CAN drop below temp again at an idle. With the temp you were describing of -19, I'd say that was pretty cold.

 

I did not mean to say -19 sorry should have been 19 F or -7 C , I was also wondering if it could be a by-product perk of my intake ?
Ralph

 

thats normal, mine did it this morning, it is just to help warm the engine up when it is cold.

 

It is quite clearly described in the owners manual.
It is normal and should be happening.[sm=icon_rtfm.gif]

 

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You hurt my feeler