[gunite]

Yes it always pulses even when not triggered but only when the engine is running. It does not pulse when the ignition is in the on position.

The blue wire is connected firmly.

If I ground the blue wire it does stop pulsing.

The red led is not lit all the time.

If I ground the green wire that feeds the FIA2 the pump turns on and the HSV opens (without pulsing) and flows water.

My current ecu is the AEM version2 if that makes any difference.

I assume the wiring diagram is the same for the HFS-6 as I have ordered one from Howerton Engineering. This is the wiring diagram I need for the supra but I would like to have the HSF-5 working for resale purposes.