Re: Subaru STi to HFS-3 wiring diagrams (2004-2011)
 

Yes, it is correct.

After you have removed the DHB, a yellow led on the gauge will be lit at "gauge off" mode.
This reminds you the system is running high boost without water injection.

Please confirm this.

Re: Subaru STi to HFS-3 wiring diagrams (2004-2011)
 

That is exactly what happens. And the fail safes when the wmi is on seem to work just the same as before. Thanks.

Moving the jumper fron dr0 to dr1 did fix my check engine light.

Now only to figure out why when the wmi goes to fail safe the car doesn't go totally to wastegate pressure of 15-16 instead it goes to about 20.

Re: Subaru STi to HFS-3 wiring diagrams (2004-2011)
 

I assume you have setup the SC to display 5-6 bar under the manual activation test?

Have you set up the WL and WH? Try 10 am and 2 pm respectively.

Re: Subaru STi to HFS-3 wiring diagrams (2004-2011)
 

Yes. Sc is set and the WL and WH are at about 8 and 1 set by a tuner.

Re: Subaru STi to HFS-3 wiring diagrams (2004-2011)
 

Unplug the grey harness, and see if the boost pressure drop down to wastegate. Don't it for too long in case it stays high as aquamist is unplugged.

Re: Subaru STi to HFS-3 wiring diagrams (2004-2011)
 

Hi Richard, will all this information be the same for the HSF-4? I haven't been able to find any 2012 STI installation info?

Thanks,

Re: Subaru STi to HFS-3 wiring diagrams (2004-2011)
 

I will update the HFS4-v3 to sti soon. On the HFS4 forum.

Re: Subaru STi to HFS-3 wiring diagrams (2004-2011)
 

Thank you,

Re: Subaru STi to HFS-3 wiring diagrams (2004-2013)
 

Just uploaded HFS3-v3 to sti wiring drawing

Re: Subaru STi to HFS-3 wiring diagrams (2004-2013)
 

Hello,

Just bought the HFS-3 kit from howertonengineering. Could someone help with the wiring diagram for 2011 WRX STI GRB SPEC C JDM Model.

thanks

Darwin