# how to pass emission with no cat ??

**URL:** <https://forums.speedlife.net/t/how-to-pass-emission-with-no-cat/204004>\
**Category:** PittSpeed Automotive\
**Created:** [October 23, 2009, 2:40am UTC](https://forums.speedlife.net/t/how-to-pass-emission-with-no-cat/204004 "2009-10-23T02:40:45Z")\
**Posts on this page:** 1\
**Showing post:** 26

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**Author:** ![flyinglow57](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/flyinglow57/32/5978_2.png) [@flyinglow57](https://forums.speedlife.net/u/flyinglow57)\
**Post date:** [November 7, 2009, 3:57pm UTC](https://forums.speedlife.net/t/how-to-pass-emission-with-no-cat/204004/26 "2009-11-07T15:57:53Z")

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> [@most of u probly wont like me but ill change](https://forums.speedlife.net/t/most-of-u-probly-wont-like-me-but-ill-change/41533/51):
>
> ok , so i built the 2 fouler set up and put my o2 sensor in and the check engine light is out but that normal for my car because anytime i unplug the battery it takes awhile for the light to come back on…is there a way i can test it now and not wait till the cel comes back on?

usually it takes about 50 miles to finally go thru the whole check so get out there and do some driving. if it doesnt come on in a few days id hurry and go get it inspected

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