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Hi all. I connected an ATOM as a piggy back to a Honda OEM EK9 ECU and the tachometer runs fine. Problem starts when I disconnect the OEM ECU tacho wire and the tacho operates for about 1 sec and goes dead. When this OEM wire is reconnected, the tacho is alive again. I then connected a Xtreme ECU to the engine (with all wiring) and the tacho runs fine with the OEM ECU fully disconnected. With the engine running (on ATOM), I measured the OEM tacho wire at 6.5VDC. Pls advice. Thanks.