# RPM jumps on deceleration

**URL:** <https://community.cartalk.com/t/rpm-jumps-on-deceleration/38279>\
**Category:** Maintenance/Repairs\
**Tags:** sl, sensors, saturn\
**Created:** [October 18, 2009, 4:12pm UTC](https://community.cartalk.com/t/rpm-jumps-on-deceleration/38279 "2009-10-18T16:12:55Z")\
**Posts on this page:** 7\
**Page:** 2

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**Author:** ![Tone2389](https://avatars.discourse-cdn.com/v4/letter/t/6f9a4e/32.png) [@Tone2389](https://community.cartalk.com/u/Tone2389)\
**Post date:** [August 18, 2020, 9:04pm UTC](https://community.cartalk.com/t/rpm-jumps-on-deceleration/38279/24 "2020-08-18T21:04:32Z")

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My 2010 fx35 does the exact same thing. It idles normal sitting and when I’m driving but when I’m decelerating or coasting the vehicle idles to about 2000 rpms then drops back to normal. I can’t figure it out! Did you ever fix the problem?

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**Author:** ![Tone2389](https://avatars.discourse-cdn.com/v4/letter/t/6f9a4e/32.png) [@Tone2389](https://community.cartalk.com/u/Tone2389)\
**Post date:** [August 18, 2020, 9:06pm UTC](https://community.cartalk.com/t/rpm-jumps-on-deceleration/38279/25 "2020-08-18T21:06:42Z")

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My exact problem

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**Author:** ![Tone2389](https://avatars.discourse-cdn.com/v4/letter/t/6f9a4e/32.png) [@Tone2389](https://community.cartalk.com/u/Tone2389)\
**Post date:** [August 19, 2020, 1:48am UTC](https://community.cartalk.com/t/rpm-jumps-on-deceleration/38279/26 "2020-08-19T01:48:31Z")

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Does it only rev up when u hit then breaks? You might have a leak in the break booster

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**Author:** ![VOLVO-V70](https://avatars.discourse-cdn.com/v4/letter/v/8e8cbc/32.png) [@VOLVO-V70](https://community.cartalk.com/u/VOLVO-V70)\
**Post date:** [August 19, 2020, 2:10am UTC](https://community.cartalk.com/t/rpm-jumps-on-deceleration/38279/27 "2020-08-19T02:10:10Z")

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> [@Tone2389](#):
>
> Does it only rev up when u hit then breaks? You might have a leak in the break booster

Brakes not breaks.

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**Author:** ![Tone2389](https://avatars.discourse-cdn.com/v4/letter/t/6f9a4e/32.png) [@Tone2389](https://community.cartalk.com/u/Tone2389)\
**Post date:** [August 19, 2020, 2:28am UTC](https://community.cartalk.com/t/rpm-jumps-on-deceleration/38279/28 "2020-08-19T02:28:29Z")

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Eh who cares.

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**Author:** ![Hudsont314253](https://avatars.discourse-cdn.com/v4/letter/h/8dc957/32.png) [@Hudsont314253](https://community.cartalk.com/u/Hudsont314253)\
**Post date:** [October 2, 2020, 8:54pm UTC](https://community.cartalk.com/t/rpm-jumps-on-deceleration/38279/29 "2020-10-02T20:54:32Z")

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I have a Nissan Armada that does this and has these idle jumps from 700-1500rpm. It does it when breaking too. What was the fix?!

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**Author:** ![VOLVO-V70](https://avatars.discourse-cdn.com/v4/letter/v/8e8cbc/32.png) [@VOLVO-V70](https://community.cartalk.com/u/VOLVO-V70)\
**Post date:** [October 2, 2020, 9:43pm UTC](https://community.cartalk.com/t/rpm-jumps-on-deceleration/38279/30 "2020-10-02T21:43:55Z")

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But does it do it when 'Braking ’ ?

Hudson , Mr. Cigroller has not been on this forum for over 3 years so I doubt he will reply.

You will be better served by clicking on the New Topic button and starting your own thread . Give year of your vehicle and a clear description of what exactly is wrong.

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