# Acceleration trouble

**URL:** <https://community.cartalk.com/t/acceleration-trouble/91182>\
**Category:** General Discussion\
**Created:** [September 15, 2015, 11:50pm UTC](https://community.cartalk.com/t/acceleration-trouble/91182 "2015-09-15T23:50:06Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![RowdyRhino](https://avatars.discourse-cdn.com/v4/letter/r/87869e/32.png) [@RowdyRhino](https://community.cartalk.com/u/RowdyRhino)\
**Post date:** [September 15, 2015, 11:50pm UTC](https://community.cartalk.com/t/acceleration-trouble/91182/1 "2015-09-15T23:50:06Z")

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As you accelerate its increases power somewhat gradually then at a certain point the car goes into a type of boost almost. What is happening at this point?

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**Author:** ![chaissos](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/chaissos/32/2347_2.png) [@chaissos](https://community.cartalk.com/u/chaissos)\
**Post date:** [September 16, 2015, 12:40am UTC](https://community.cartalk.com/t/acceleration-trouble/91182/2 "2015-09-16T00:40:00Z")

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Is it a VTEC engine? Turbo?

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**Author:** ![VDCdriver](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/vdcdriver/32/30_2.png) [@VDCdriver](https://community.cartalk.com/u/VDCdriver)\
**Post date:** [September 16, 2015, 1:48am UTC](https://community.cartalk.com/t/acceleration-trouble/91182/3 "2015-09-16T01:48:45Z")

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I agree that this sounds like an engine with variable valve timing, or…perhaps…an engine with a turbo charger.

Is there any chance that the OP would like to reveal the make, model, and model year of his/her _mystery vehicle_, so that a more conclusive answer is possible?

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**Author:** ![George\_San\_Jose1](https://avatars.discourse-cdn.com/v4/letter/g/e5b9ba/32.png) [@George\_San\_Jose1](https://community.cartalk.com/u/George_San_Jose1)\
**Post date:** [September 16, 2015, 6:18am UTC](https://community.cartalk.com/t/acceleration-trouble/91182/4 "2015-09-16T06:18:40Z")

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Maybe the automatic transmission is downshifting to provide more acceleration. When the driver pushes hard on the pedal, that’s what it is supposed to do. Do you notice the engine rpm increase rapidly when this happens?

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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:** [September 16, 2015, 6:48am UTC](https://community.cartalk.com/t/acceleration-trouble/91182/5 "2015-09-16T06:48:43Z")

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Until the OP provides real information suggestions are basically worthless.