This harness allows users with Ford TFI rotor to pick up the crank and cam timing directly from the rotor. This not only simplifies installation on these applications by providing an existing timing source, it also allows ECU-controlled ignition timing using the stock coil. Can also be used with the TFI rotor and aftermarket CD ignition (such as MSD.) Plugs directly into rotor on one end and to the ignition sub-harness connector on the Holley main harness. (Note that some versions of the Ford TFI did not have a cam timing output, only crank timing.)

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Wiring Diagrams for
Holley ECU's and Harnesses
(See page 14 and 15.)