# 2008 Chevrolet HHR - Lost some power

**URL:** <https://community.cartalk.com/t/2008-chevrolet-hhr-lost-some-power/185196>\
**Category:** Maintenance/Repairs\
**Tags:** chevrolet, engines\
**Created:** [July 12, 2022, 3:09am UTC](https://community.cartalk.com/t/2008-chevrolet-hhr-lost-some-power/185196 "2022-07-12T03:09:22Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![MarkPedigo](https://avatars.discourse-cdn.com/v4/letter/m/838e76/32.png) [@MarkPedigo](https://community.cartalk.com/u/MarkPedigo)\
**Post date:** [July 12, 2022, 3:09am UTC](https://community.cartalk.com/t/2008-chevrolet-hhr-lost-some-power/185196/1 "2022-07-12T03:09:22Z")

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I have a 2008 Chevy HHR LT with a 2.4 engine and is has 188,000 miles and just started to lose power and have one cylinder out not firing. Any ideas what it can be?  
Mark

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**Author:** ![Purebred](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/purebred/32/46796_2.png) [@Purebred](https://community.cartalk.com/u/Purebred)\
**Post date:** [July 12, 2022, 12:54pm UTC](https://community.cartalk.com/t/2008-chevrolet-hhr-lost-some-power/185196/2 "2022-07-12T12:54:45Z")

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Several possible problems. What are the code numbers you are getting? Do a compression check and engine vacuum check.  
Report back with those findings, then someone on the site may point you in the right direction.

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**Author:** ![Mustangman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mustangman/32/44130_2.png) [@Mustangman](https://community.cartalk.com/u/Mustangman)\
**Post date:** [July 12, 2022, 8:33pm UTC](https://community.cartalk.com/t/2008-chevrolet-hhr-lost-some-power/185196/3 "2022-07-12T20:33:08Z")

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Worn out rings or valves in that one cylinder. A compression test will tell you how bad it is and whether it is rings or valves.

Engine rebuild time!

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**Author:** ![weekend-warrior](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/weekend-warrior/32/26122_2.png) [@weekend-warrior](https://community.cartalk.com/u/weekend-warrior)\
**Post date:** [July 12, 2022, 8:36pm UTC](https://community.cartalk.com/t/2008-chevrolet-hhr-lost-some-power/185196/4 "2022-07-12T20:36:54Z")

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the coil for that cylinder could be bad.

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**Author:** ![bing](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/bing/32/4619_2.png) [@bing](https://community.cartalk.com/u/bing)\
**Post date:** [July 12, 2022, 8:41pm UTC](https://community.cartalk.com/t/2008-chevrolet-hhr-lost-some-power/185196/5 "2022-07-12T20:41:13Z")

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Yeah a little testing but I suspect with that many miles on a four cyl working it’s tail off is finally saying uncle.

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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:** [July 12, 2022, 11:36pm UTC](https://community.cartalk.com/t/2008-chevrolet-hhr-lost-some-power/185196/6 "2022-07-12T23:36:25Z")

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First step: Have your shop read out the computer’s diagnostic codes and do a compression test. If you post the results here, you’ll get some further ideas.