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post #81 of (permalink) Old 11-14-2012
Grimace427's Avatar
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Originally Posted by strany View Post
Educate me please, my rear O2 sensors are turned off, are you saying that my plugs will foul sooner because of this?
Originally Posted by nsadams87xx View Post
No no, you can use anti foulers on your O2 sensors to back them out of the exhaust stream to help not trigger a CEL. Sometimes it works, sometimes it doesn't. You kinda just have to give it a shot.

Exactly. The rear O2 sensors need to be on to pass emissions rediness tests, and the anti-foulers just reduce the sensitivity of the sensors so they don't trigger a CEL.
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