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Thread: No tach signal

  1. #1
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    No tach signal

    would anyone know why tach signal isn't getting sent to tach on 300 promax , Has 12 volts and went turned on volt meter will read 3.5 for a second and needle jumps. That's all it will do though would that be ecu are something different?
    Thanks in advance for any help

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    Voltage regulator I would think

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