When warming up engine increases idle speed after some time

[Dan"gerous"]

I'm running DJ's street w/cold fix and when I start the truck and fiddle around for a few minutes before taking off the trucks idle speeds up several hundred RPM's. Any idea why this happens? Is it a quirk with the programming or is it suppose to do that for some reason?

[strokermann]

that is the high idle. when you let it sit for a few min the engine will raise its rpm to help warm up especially up here in the north it will do it more offten. normal. don't worry about it.

[bigd4x4]

That's actually in the Ford programming. I think it came out in the buzz fix. That's when I noticed it anyway. If you tap the brake it will drop back down to idle Then after a few minutes it will go back up.

[SMKSTAX]

Yup that's from Ford. Idle kicks up to help the engine warm up in cold starts. As soon as the motor is warm it kicks back down automatically or like bigd said as soon as you put your foot on the brake it will kick down. Perfectly normal.

[Dan"gerous"]

Thanks Guys

[GPD270]

I watched mine when I cranked it today. If I read the owners man. correctly it will do that when it its below 50 degrees I think. 130 seconds after starting it will rev. up until the engine is warm.

[HeavyHauler]

Perfectly normal! It will drive ya crazy if you have to sleep in your truck when its cold out, idling up & down on its own ( I used to run mine as a hot-shot rig, used the back seat for a sleeper! )

[yelwinger]

I thought it was to get more oil to the top end, more for the turbo?

[LvTitan]

Originally Posted by SMKSTAX

Yup that's from Ford. Idle kicks up to help the engine warm up in cold starts. As soon as the motor is warm it kicks back down automatically or like bigd said as soon as you put your foot on the brake it will kick down. Perfectly normal.

or throttle.
it is factory ford thing and if you touch the brake or the throttle it will drop back down.

[BioStroker]

In cold weather should you wait until the RPMs do ramp up before driving away? What's the recommended heat up time for cold weather-let's say 15 degrees or so?