[Richard L]

If you have a 3.5bar MAP sensor, solder link 3 instead of 2.

The aquamist system is a universal system, it can read IDC signals on most platforms. The user manual has some generic information. Helpful to the installer. This system has been installed on a MZ3 for years. Non of our dealers are expected to supply a wiring diagram for every system sold to a specific car. I believe this is the responsibility of the shop that does the installation.

There are hundreds on models out there we do not have a wiring for. The purchaser should do some research into an appropriate shop to do the install. Good reason being the car owner will most probably have more resources than us.

Back to the topic in hand. The HFS4 should not behave erratically. The green will blink up and down with IDC this is normal. In order to confirm what the IDC reading is correct, link the FDC (fuel duty cycle) jumper. This hi-jacks the gauge to display IDC instead of water flow.

It is unlikely the board suffered damage from bad wiring but can happen. But it does appeared to be damaged from your description.

I cannot advise you what to do next as you are not prepared to test it on the road nor on the dyno.