Tach Signal while on the dyno, COP's and Cap question
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Tach Signal while on the dyno, COP's and Cap question
I have run into this issue a few times when on the dyno on a few cars. Basic set-ups are DIYPNP's and Toyota COP's. When on the dyno the tach signal being picked up through the inductive wires on the dyno is weak. Some days are better than others, but I was looking for ways to correct or boost the signal to try and help the issue. I tried adding a capacitor to the COP harness and the car fired right up and seemed to idle smoother, but the tach signal in the cluster was gone. I am running a resistor in the diagnostic box, would adding the capacitor to the COP's and removing the resistor restore my tach in the cluster?
In order to keep the capacitor and have a tach, I may have to rewire the tach signal to come from the Megasquirt instead of the Toyota coils.
Does anyone have any other suggestions to avoid the dyno having trouble picking up our tach signal?
In order to keep the capacitor and have a tach, I may have to rewire the tach signal to come from the Megasquirt instead of the Toyota coils.
Does anyone have any other suggestions to avoid the dyno having trouble picking up our tach signal?
Last edited by MX5RACER; 01-24-2021 at 08:22 PM. Reason: Added "car" to" "and the car fired right up..."
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