System will not trigger from IDC

[crum86]

Got a HFS3 V2 in my car which was running fine with the old EMS8860 engine management. I have since changed to a Haltech PS2000 but I can't seem to get it to reach the injection threshold, even with the dial turned right back. The IDC led is flashing so it is getting an injector pulse of some sort. I'm running 6 x low impedance 750cc injectors (2.2ohm) if that makes any difference and I'm fairly certain the ecu used a peak and hold driver. Impedance can be selected in the ecu and there are no resistors wired into the loom. The signal is wired up through the green wire on the grey plug and red is to a ign source.
I've noticed a couple of posts about cutting and soldering links on the board. Is this something that I will need to do or should I try wiring in the green harness as I've noticed in later versions say to use this for peak and hold?