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NOx sensor - ultra lean tuning

Discussion in 'Performance and Tuning' started by soggyBottom, Aug 21, 2023.

  1. Aug 21, 2023 at 3:34 PM
    #1
    soggyBottom

    #1
    soggyBottom [OP] Well-Known Member

    Joined:
    Sep 19, 2018
    Member:
    #266818
    Messages:
    1,937
    The 2GR-FKS (3.5L) has direct injection but doesn't leverage ultra-lean combustion (ULC). I'm interested in messing with the fuel map to achieve ULC but not if the NOx goes up. I don't know why toyota decided to not run the 2GR-FKS this way but assuming it is possible, I want to give it a shot. I would be stoked if I could just get it running at idle.

    What possible solutions do I have for running a NOx sensor? I've considered wiring up an OEM one from a diesel engine with a custom PCB, but I have no way of calibrating it. Any thoughts or ideas?


    There is a good post from the hpacademy.com forums on what ULC is.
    --https://www.hpacademy.com/forum/general-tuning-discussion/show/leaner-lambda-values-when-using-direct-injection
     
    soggyBottom, Aug 21, 2023
    #1

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