I used a ECU with a different code in my car while doing the auto to manuel tranny swap and it works fine. No codes and all previous functions still work.
ATX MTX swap, rear drum disc swap, drilled rotors, ported intake, optim throttle body, CAI, 7.5L MAF, adj. fuel regulator, longtube headers, underdrive pulley, no EGR, low inpedence bigger injectors, 2002 Focus Swap
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