Rpm band and no misfires on the top. The Nissan cas disc has 360 slots around the outside. At high rpm the ecu can and will read one or more of the slots causing a misfire. There just too close togetger. We're tuning a turbo ka on haltech with ls coils and it breaks up bad on boost. Put a cas disc from haltech in and wa la. We just made Lemonade. We run into this issue a lot with ms3x ecu's and there pot adjustments. We just said truck it and got a full function trigger kit. There's a few ways to handle it.
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