So I bought a aqaumist HFS 2/3 system second hand. The system is new and I just installed about a week ago. For the last week I have been trying to get it work. I am pretty sure I wired up everything correctly but nothing is coming on. There is no lights on the gauge coming on, I don't hear anything from the pump but it did turn on just long enough to start bringing in fluid. I know the 12v power wires are wired correctly and grounds are good. I just can't figure out what I did wrong. I attached the wire schematic I used to wire it up to the ECU. Any help would be awesome.

My only suggestion would be to try wiring it direct to the components (MAP and Injector) instead of through the ECU.

One of the links on this page should give you the correct instructions to download.

http://www.aquamist-direct.com/806-0...ing-pwm-valve/

Good Luck.

May also be worth a shot posting on their tech forum:

http://www.aquamist.co.uk/forum2/vbulletin/

Sorry I can't be of more help.