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Thread: Will a 4.8L run with an ECM configured for 5.3L?

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  1. #1
    Fuel Injected!
    Join Date
    Apr 2017
    Posts
    235
    If you are going to run any O2 sensor feedback based engine on an engine stand I would bet with open exhaust you need to leave the O2 sensors unplugged so it does not go into closed loop.

  2. #2
    Fuel Injected!
    Join Date
    Aug 2018
    Posts
    34
    why not segment swap the engine with Universal patcher. http://www.gearhead-efi.com/Fuel-Inj...versal-Patcher

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