There are two ECUs on this car. Can you check the pin out of the other ECU. N75 is one of the two control valves. Just checked the Audi factory wiring diagram, pin50 of T63 (ECU a), GR'/WL osd the correct pinout for boost control valve N75.
The aquamist stops the boost control signal to the N75 under failsafe activation, hence lowering the boost for safety. It is not as critical if you are not tuning thr ECU for wmi injection.
If you require more flow, just set the pump pressure higher. 2x 1.2mm will spary over 1200cc/min, depending on the boost pressure and pump pressure.
Just checked the Audi factory wiring diagram, pin50 of T63 (ECU a), GN/WL is the correct pin out for boost control valve N75.
