Cold start and high idle

[zlman]

Question for those of you that also have the 3.0. I’ve owned the truck a total of three days so maybe this is normal but I’m wondering, when you first start the truck, it seems to go to high idle for what seems to me a very long time (1200rpm or so). Are others experiencing this?

 

[Meach]

Had mine 3 months does same. Kinda like high idle on a choke

 

[Rebel_Tom_2025]

I have had my Rebel since September of last year. Only stays at high idle for a minute or so.

 

[zlman]

I timed it today......7 min, something isn't right.

 

[SW Driver]

I’ve never noticed a high idle. But I just start the truck and drive off.
Are you located somewhere in the deep cold?

 

[MotorcycleBoy]

My RebelX 2025 (SST) with temperatures lower than 12/14 C remains accelerated for one or two minutes.

Porsche Boxter 3.0 lt. .... "the same thing" but with much more exhaust sound.

Here in I we are used to

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[zlman]

I’ve never noticed a high idle. But I just start the truck and drive off.
Are you located somewhere in the deep cold?

MN, temps have been in the 30's

 

[tinfoil_hat]

Totally normal, unless it ramps up and down.

 

[ks54701]

Bought on Dec 31 2025

My procedure is start the truck verify both front and rear warning sensors are off back out of the garage, hook up seat belt put in drive and head out the driveway. This is not much different than the past F150 with the 2.7EB engine which is both port and direct injected. The 2.7EB also had a high idle for a short time and also had the annoying over zealous safety sensors. Personally there is not much difference at start up.

Drove company service trucks for many miles and found over the years warm up times where best put to use going to and not setting around.

Had a broken front spring (E350 van), lost a rear differential in 1976 under warranty (2500 Chevy van). That's it folks for down time other than normal maintenance. The (4) vehicles from 1976-2009 always sat outside here central Wisconsin.

 

[tinfoil_hat]

Drove company service trucks for many miles and found over the years warm up times where best put to use going to and not setting around.

This is absolutely right. The best thing for a cold engine is to get the oil up to operating temperature as quickly as possible and the fastest way to do that is to drive it.
I think in the case of the SST engine the engineers wanted to make sure the turbos are lubricated before they receive any pressure. Based on the sound at start up I am also wondering if the waste gates are wide open at startup to get the turbines spinning and lubricated before any real boost is built up.