# Loss power

**URL:** <https://community.cartalk.com/t/loss-power/24461>\
**Category:** Maintenance/Repairs\
**Created:** [January 6, 2009, 3:34am UTC](https://community.cartalk.com/t/loss-power/24461 "2009-01-06T03:34:26Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![mic0062001](https://avatars.discourse-cdn.com/v4/letter/m/ac91a4/32.png) [@mic0062001](https://community.cartalk.com/u/mic0062001)\
**Post date:** [January 6, 2009, 3:34am UTC](https://community.cartalk.com/t/loss-power/24461/1 "2009-01-06T03:34:26Z")

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My 96 suburban has lost power. I have checked the compression and its is at 150 except 4 and 5 at 120. It sucks air in though the valve cover. Any ideas except rebuildingg engine

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**Author:** ![oldschool](https://avatars.discourse-cdn.com/v4/letter/o/e19adc/32.png) [@oldschool](https://community.cartalk.com/u/oldschool)\
**Post date:** [January 6, 2009, 4:10am UTC](https://community.cartalk.com/t/loss-power/24461/2 "2009-01-06T04:10:54Z")

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Post the engines manifold vacuum readings,unless you are done with diagnostics and are sure the engines loss of power is related to a mechanical condition,do you feel the “sucks through valve cover” is a sympton of a worn engine condition? Are you looking for a way to raise the compression on those two low cylinders?How low is the power?