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Forum: Tuning

05-18-2013, 03:18 PM

Replies: 3

Tach signal for data logger

Views: 1,998

Posted By SouthArk370Z

"Low side ignition coil" (primary side of coil)...

"Low side ignition coil" (primary side of coil) will probably be your best option. You can also tap into the crank or cam sensor, but that may load the circuit.

See the FSM (link in my sig) for...

Forum: Tuning

05-18-2013, 02:10 PM

Replies: 3

Tach signal for data logger

Views: 1,998

Posted By SouthArk370Z

FWIW, the ECM determines RPM from the POS...

FWIW, the ECM determines RPM from the POS (crankshaft position sensor) and then sends the data to the tach via CAN (ref pg MWI-12 of 2009 FSM).

What kind of signal is your datalogger looking for?...

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