# Uphill acceleration issue

**URL:** <https://community.cartalk.com/t/uphill-acceleration-issue/80091>\
**Category:** Maintenance/Repairs\
**Created:** [June 30, 2013, 7:55pm UTC](https://community.cartalk.com/t/uphill-acceleration-issue/80091 "2013-06-30T19:55:17Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![katssays](https://avatars.discourse-cdn.com/v4/letter/k/898d66/32.png) [@katssays](https://community.cartalk.com/u/katssays)\
**Post date:** [June 30, 2013, 7:55pm UTC](https://community.cartalk.com/t/uphill-acceleration-issue/80091/1 "2013-06-30T19:55:17Z")

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My 1999 GMC Suburban just started “catching” when accelerating uphill and going 50+ mph. Does not occur any other time. Any suggestions?

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**Author:** ![Docnick](https://avatars.discourse-cdn.com/v4/letter/d/ecae2f/32.png) [@Docnick](https://community.cartalk.com/u/Docnick)\
**Post date:** [June 30, 2013, 8:08pm UTC](https://community.cartalk.com/t/uphill-acceleration-issue/80091/2 "2013-06-30T20:08:45Z")

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Not sure what you mean by “catching”. Does it sputter and seem to lose power? Many vehicles don’t accelerate well going uphill; they usually downshift the automatic transmission.

Please give us a better description of what actually happens.

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**Author:** ![katssays](https://avatars.discourse-cdn.com/v4/letter/k/898d66/32.png) [@katssays](https://community.cartalk.com/u/katssays)\
**Post date:** [June 30, 2013, 8:16pm UTC](https://community.cartalk.com/t/uphill-acceleration-issue/80091/3 "2013-06-30T20:16:17Z")

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That’s the only way I could think to describe it. It doesn’t sputter, just seems to stop accelerating for a fraction of a second, then accelerates, then stops, then starts. My Suburban has always accelerated well before now.

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**Author:** ![knfenimore](https://avatars.discourse-cdn.com/v4/letter/k/9fc348/32.png) [@knfenimore](https://community.cartalk.com/u/knfenimore)\
**Post date:** [June 30, 2013, 8:32pm UTC](https://community.cartalk.com/t/uphill-acceleration-issue/80091/4 "2013-06-30T20:32:44Z")

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Sounds as if it is loosing engine power under load. Could be plugs or wires. Hard to tell without seeing it.

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**Author:** ![oldtimer-11](https://avatars.discourse-cdn.com/v4/letter/o/e79b87/32.png) [@oldtimer-11](https://community.cartalk.com/u/oldtimer-11)\
**Post date:** [June 30, 2013, 8:55pm UTC](https://community.cartalk.com/t/uphill-acceleration-issue/80091/5 "2013-06-30T20:55:53Z")

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could also be a fuel filter.