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sebdut
18-07-2011, 07:46 PM
Does the hfs-3 runn even if the failesafe is not connect to the n75 on the ECU?

Howerton Engineering
19-07-2011, 04:12 AM
Yes, the failsafe need not be connected, the unit will still run.

sebdut
19-07-2011, 01:00 PM
And so DHB on the controller must be unlincked and DFS linked that's right?
Another question the "inj" jumper as said in the notice is the same of FAV jumper for disabling the FAV?

Howerton Engineering
19-07-2011, 04:40 PM
If you don't hook the white and brown wires up to the N75 valve, it doesn't matter if you change the jumpers or not. If you have hooked up the wires and want to disable the failsafe from interfering with the N75 valve then yes, you need to change the jumpers. Is this what you are trying to do?

Yes, the INJ jumper, when removed, disables the FAV.

sebdut
19-07-2011, 05:16 PM
Ok thanks so I don't hook the wires up to the n75.
The problem for disable the FAV is Thatcher I don't see the INJ jumper on the controller I see FAV jumper

Howerton Engineering
19-07-2011, 05:48 PM
Sorry, the V1 board(blue board) the jumper was labeled INJ.

For the V2 board(black board) the jumper is FAV.

It does the same thing.

sebdut
19-07-2011, 06:44 PM
Ok that's I was thinking thanks for your help

m.s4
30-09-2011, 06:11 AM
If you don't hook the white and brown wires up to the N75 valve, it doesn't matter if you change the jumpers or not. If you have hooked up the wires and want to disable the failsafe from interfering with the N75 valve then yes, you need to change the jumpers. Is this what you are trying to do?

Yes, the INJ jumper, when removed, disables the FAV.

This is what I want to do for the track where my midthrottle interferes occasionally . Which pins do i need to switch to disable the failsafe but allow my n75 to function normally?

Howerton Engineering
30-09-2011, 11:01 PM
Pull the jumper from PRK and place on DFS to disable the failsafe during normal operation.

Richard L
01-10-2011, 02:19 PM
Jeff,

I think m.s4 has v1 circuit board. DFS jumper link is not available.

m,s4,

You can do several things:
1. Widen the WL and WH window
2. Set the F/S delay trimmer to fully clockwise.

m.s4
03-10-2011, 03:58 PM
Jeff,

I think m.s4 has v1 circuit board. DFS jumper link is not available.

m,s4,

You can do several things:
1. Widen the WL and WH window
2. Set the F/S delay trimmer to fully clockwise.

You are correct, I have the first version.

I already have the WL and WH window widened and it still interferes occasionally on the track.

I will play with the timer a bit and see if that helps. There's no way to keep it from clipping boost? I might need to do some re-wiring then to make it so the failsafe is easily removable.

Richard L
03-10-2011, 09:44 PM
Try the delay trimmer, it is very effective, filters out all the spikes.