Abnormal High Idle During Cold Start

[Orcman84]

Brand new ‘22 JLUR. 280 miles. 6 MT. I’ll be reaching out to the dealership about this, but I wanted to see if anyone else has experienced this and what the resolution was.

At times when I start the Jeep in the morning and shift from first to second, I barely need to give it any acceleration to get it going. It can move so fast my first reaction is to take it out of gear. Twice in the past twenty-four hours, I’ve taken it out of gear and the RPMs will go right to 3000 without me even touching the gas pedal. If I tap the gas pedal, the RPMs will go to a normal idling level. My last two vehicles (‘04 TJ & ‘10 Subaru) have had high idles when I do a cold start, which I know is normal, until the engine reached a certain temperature or I tapped the gas pedal, but this doesn’t feel right in the ‘22 JL.

I’m wondering if it’s an issue with the electronic throttle. There are no CELs or warning messages either.

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[AcesandEights]

@Orcman84 It's normal, especially when it's new. It'll calm down after a month or two, maybe 1,500 - 2,500 miles. There is also an issue of rev-hang (google it), but it too is normal.

 

[Orcman84]

@Orcman84 It's normal, especially when it's new. It'll calm down after a month or two, maybe 1,500 - 2,500 miles. There is also an issue of rev-hang (google it), but it too is normal.

Much appreciated for the quick response!

 

[Some Random Guy]

Yep, normal. My new Sport is doing it too. I forgot about it and also thought something was wrong at first.

 

[fourseasons1621]

Same here 2021 with 2k miles. Does exact same thing. I typically wait 30 seconds or so for it to calm down

 

[Chazdog]

7K miles and mine still does it. It‘s alarming when you‘re in gear and the Jeep surges. Not sure why it would calm down eventually but I hope it does.

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