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Old 07-14-2014, 09:01 AM   #1
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High Altitude Engine Tune?

My wife and I are getting ready to move to the Silverthorne area. We are out looking for apartments and my JK seems to be shifting hard in the high elevations (it's an automatic). I've adjusted for larger tires, but it still wants to stay in gear a lot longer. Do the Wranglers sold in higher elevations have a different engine tune to account for the thin air?

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Old 07-14-2014, 11:15 AM   #2
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All vehicles with modern fuel injection will self adjust for any altitude. What you are experiencing is reduced engine power due to the thinner air.

The only way to regain some of that power back is to add a tuner and/or regear to lower (higher numerically) gears. New gears will give the best performance.

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Old 07-14-2014, 11:45 AM   #3
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If you want to force the re-learn... you should be able to pull the batter and hold the brake pedal down to drain any residual power from the system. Leave it for about 15 minutes, plug it back together and start it up. The ECU should have its tune back to factory to where it adapts faster.
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Old 07-14-2014, 12:02 PM   #4
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I just drove over the Rockies after a week out west. Climbing up, the auto trans on the 3.6 kept wanting to jump up to 6k rpms looking for power. I thought something was wrong with the engine until I realized what altitude we were at. It really does change things.
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Old 07-15-2014, 03:48 PM   #5
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I just drove over the Rockies after a week out west. Climbing up, the auto trans on the 3.6 kept wanting to jump up to 6k rpms looking for power. I thought something was wrong with the engine until I realized what altitude we were at. It really does change things.
This is exactly what mine was doing. Thanks for the info.
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Old 07-15-2014, 04:22 PM   #6
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Going from the lower altitude to up here you will loose copse to 20% of your horse power. As stated above the main way to regain it back is to spend $$$. Or you can be like most of us and get used to it. Once you get used to the way it runs at altitude and then go back to a lower altitude your Jeep will feel like a bad a$$ machine!!!.

Welcome also from Buena Vista. Only 8000' here.
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Old 07-15-2014, 05:46 PM   #7
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You could always just put your Jeep on oxygen! . It's amazing how people underestimate altitude when making decisions on their Jeeps or driving through high elevation. It really does effect performance!
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Old 07-16-2014, 07:58 PM   #8
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Going from the lower altitude to up here you will loose copse to 20% of your horse power. As stated above the main way to regain it back is to spend $$$. Or you can be like most of us and get used to it. Once you get used to the way it runs at altitude and then go back to a lower altitude your Jeep will feel like a bad a$$ machine!!!.

Welcome also from Buena Vista. Only 8000' here.
I turned down the job offer. We really wanted to live there, but the standard of living in Avon/Vail is unreal. Couldn't afford to live there.
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Old 07-17-2014, 07:41 AM   #9
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Most people don't live there. They commute from another town like Leadville Kremmling Eagle or look into places to rent for the people who work in the area. Living here in the high country you get used to driving for most things. Driving 100 miles to go shopping or see a movie is nothing.
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Old 07-17-2014, 05:40 PM   #10
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Most people don't live there. They commute from another town like Leadville Kremmling Eagle or look into places to rent for the people who work in the area. Living here in the high country you get used to driving for most things. Driving 100 miles to go shopping or see a movie is nothing.
That's crazy.
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Old 07-17-2014, 08:54 PM   #11
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That's crazy.
Not crazy. Just normal for us

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