# Engine Breakdown - Acceleration

**URL:** <https://community.cartalk.com/t/engine-breakdown-acceleration/32783>\
**Category:** Maintenance/Repairs\
**Created:** [July 2, 2009, 8:56pm UTC](https://community.cartalk.com/t/engine-breakdown-acceleration/32783 "2009-07-02T20:56:34Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Marjorie\_and\_Tom](https://avatars.discourse-cdn.com/v4/letter/m/e0b2c6/32.png) [@Marjorie\_and\_Tom](https://community.cartalk.com/u/Marjorie_and_Tom)\
**Post date:** [July 2, 2009, 8:56pm UTC](https://community.cartalk.com/t/engine-breakdown-acceleration/32783/1 "2009-07-02T20:56:34Z")

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We have a 1996 GM Yukon. When we slow down and accelerate at speeds between 45 mph and 55mph, the engine hesitates and breaks down for a very short time and then it’s fine. Does anyone know what could cause this?

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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:** [July 2, 2009, 9:15pm UTC](https://community.cartalk.com/t/engine-breakdown-acceleration/32783/2 "2009-07-02T21:15:11Z")

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Bad fuel pump?  
Bad spark plugs?  
Clogged air filter?  
Clogged fuel filter?  
Gunked-up throttle body?  
Dirty Mass Air Flow Sensor?

Please post back with the vehicle’s odometer mileage and its maintenance history, and don’t just tell us something of a general nature, such as “it has been well maintained”. Specifics, please.