How to control the HFS-4 from a Link G4+ ECU
I would like to connect my HFS-4 to my Link G4+ ECU in such a way that I can control the signal (and flow) of the water/meth injection independent from the fuel injector DC.
The Link ECU has general purpose Aux outputs that can deliver a PWM signal with variable duty cycle. I can assign the DC based on a 3D table with RPM and MAP as X and Y axis.
What I am not sure of is how to wire the HFS to the Link ECU.
The HFS has wires for both "conventional" injectors and "peak and hold" injectors. I don't know which set of wires to connect to the ECU.
Also, I am unsure of how to connect the wires to the ECU. Would the (+) go to a switched 12v from the ECU and the (-) go to the Aux? Or would the (-) go to ground and the (+) go to the Aux output? I think the Aux can be configured for either type of switching.
Thanks in advance
MethOD
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