# My mpgs are suckingggg help!

**URL:** <https://forums.speedlife.net/t/my-mpgs-are-suckingggg-help/263445>\
**Category:** Shift518 Automotive\
**Created:** [April 18, 2012, 8:49am UTC](https://forums.speedlife.net/t/my-mpgs-are-suckingggg-help/263445 "2012-04-18T08:49:02Z")\
**Posts on this page:** 1\
**Showing post:** 28

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**Author:** ![KrazyKid](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/krazykid/32/6371_2.png) [@KrazyKid](https://forums.speedlife.net/u/KrazyKid)\
**Post date:** [April 18, 2012, 11:47am UTC](https://forums.speedlife.net/t/my-mpgs-are-suckingggg-help/263445/28 "2012-04-18T11:47:32Z")

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> [@HAPPY BIRTHDAY CHOKO!!!](https://forums.speedlife.net/t/happy-birthday-choko/49190/18):
>
> change front o2 only. Try a sparkplug defouler on the rear o2.

thats what I ment. good catch, I had no cat on my mind when I said rear o2.

FRONT or Upstream o2 when you go to get the sensor Amanda.

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