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Rw vmac ll

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I am installing a harness and ECM into a RW713 from a 1997 RD688s.

I can't get the tachometer to work. When the engine starts, it goes to max and stays there. If I hook my old tachometer to the sensor from the flywheel, it works ok.

The speedometer works.

Does the ECM needs to be calibrated for the e9?

Any suggestions will be appreciated.


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