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Thread: 4.6L oxygen sensors

  1. 06-28-2021, 07:49 AM #1
    Jaguar Engineer
    Jaguar Engineer is offline
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    4.6L oxygen sensors

    I’m using a 4.6L 2v donor engine. I plan on doing a cat delete program. Which O2 sensor do I need to retain upstream or downstream?
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  2. 06-28-2021, 07:58 AM #2
    weendoggy
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    Upstream. You can "fool" the after cat one, it verifies the upstream working.
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