[Trickycoupe]

Gaz,
Standard 2015+, Ford Coyote ECU / controls pack designed for this year motor.

In any case, the tacho has been taken out and tested by an instrument specialist. The outcome of which is that the tacho is faulty and not responding to ECU inputs and inputs from coil negative are very unstable.

It ran good on alternator input so have set it up in that way temporarily until the owner can sort a replacement tacho from the supplier of the car.

As all the wiring is still in place, (apart from one solder joint) it will pretty much be a plug and play when a replacement is made available.