BLACK'98DSM
5+ Year Contributor
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- 1,911
- Feb 9, 2019
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Alabama
Simple question today:
Should I put a wideband O2 sensor before or after the cat? I'm assuming before to get an accurate reading, and since the one after is to check that the cat still works...
Should I put a wideband O2 sensor before or after the cat? I'm assuming before to get an accurate reading, and since the one after is to check that the cat still works...