[dubversion]

I've installed mine today and i will make a link to a seperate installation thread on this forum. A few things i already want to mention:

1) When you are in test mode, and you're checking the wiring, by unplugging all connections to the controller but the power cable, the grey ECU connector and the gauge, you'll ALSO have to connect the GREEN user connector to the controller. The green USER cable has the Direct injection signal. It does NOT state this in the manual for the HFS4 v2 that i have, and probably also not in the v3. If you do not connect the green USER connector, the controller will not pick up (indirectly) the throttle position, which is supposed to blink accordingly in the early test phase. We found that it doesn't blink at all and stays off throughout, indicating a possible wiring issue, but it's just you're controller needs the green user cable.

2) The last test before you can tune the car, is to set the "sensitivity" of the system with the THRES dial on the controller. By default, this will be set to 12 o'clock, but i had to set it 3'o clock (almost completely counter clockwise) before it would start to spray anything.

3) Another thing that wasn't immediately clear to me, is that there's actually an ON-OFF switch on the gauge. Very helpful if you're testing with the SYS jumper in place; it's a quick way to engage/disengage the priming test and the nozzle/jet test.

In my 335i Touring E91, it took me one full day to install the hardware and one day to test the system. I reckon to custom tune by Cobb flash will be another day.

Also, don't forget to turn the SC dial on the gauge to indicate the 5-6 bars in SYS testing mode, as instructed by the manual.

Hope that helps. My installation thread will follow once i have some dyno results to back it up.

Greetings,

Dub