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Thread: Wideband sensor on stock exhaust system.

  1. #1
    Advanced Tuner
    Join Date
    Jun 2010
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    Wideband sensor on stock exhaust system.

    Guys I've search around and found a lot of threads talking about where to locate the wideband sensor, before or after the cats.
    I have a 2014 Silverado want it to test the wideband and, I read that some put them before and some after the catalyst. Well I don't have to much room before the cats it's like 4-5 inches of pipe after the manifold and on my manual it says to install it from 12/15 inches after the manifold or it can damage the sensor to close to the manifold.

    What is the difference installing the sensor before and after the cats.

  2. #2
    Tuner
    Join Date
    Mar 2017
    Location
    Ft. Lauderdale, FL
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    95
    Some folks say that installing after the cats will cause the reading to be off. That's never been my experience, however the one thing I do find is that the delay between when things change and when the sensor sees them IS increased when the sensor is post-cat.

    Unless you're trying to tune to the ragged edge, I don't personally find it to be worth fretting over.
    2007 Z06 (E38 ECM), stock LS7 short block, .030" milled/ported heads, PLX SM-AFR, MPVI Pro