HomemadeTurbo - DIY Turbo Forum - VAFC Install Instructions

Contrary to what people say. VAFC2 is the only one that will work on our 7th gen cars running D17 engines and vtec.One day I was doing a head swap into my DX and putting a EX head so i would have vtec capabilities and needed the wiring diagram for our cars.. as i was doing the install i notcied that not all the wires were being connected and used considering APEXI doesnt have the proper diagram for our cars... Which in turn is why i created this full install...With that in mind, while installing the unit i noticed that the manual that came with the thing does not have our car model listed but it does have our engine D17 listed... its listed as EU3 or EU4 in the book which says to use diagram H8-a... this is wrong.. it will get u the right install but not all the wires connected.. yes i know there is another thread that says its missing the VTM wire... but it is also missing another wire.. the TDC wire.. when installing the VAFC2 u should follow diagram H7-b which shows u were to connect the VTM wire and TDC wire.. but DO NOT connect the VTC CAM SIGNAL wire cause we do not have that on our cars... that wire on the ECU is for the Secondary 02 Sensor and not the VTC.. just tape it off and put it to the side cause its the only wire that wont be used.... the diagram also shows where to connect the VTM wire..Basically u are using a combination of diagram H8-a and H7-b to complete the install.. After creating this install guide GEARBOX has also gone back and redid his wiring to connect the rest of the wires.. He also has gone and made a modified version of Diagram H8-a which shows the rest of the connections.... My car runs fine and so does gearbox and hope this helps with everyones install. ~xproductionz

*Here is the updated wire diagram. I don't know what benefit the TDC will give, but it's better to just have it hooked up. Thanks for the info. ~gearbox

The second piece of info you need to install this thing is the vafcII harness color code from the manual. This will show you how to match up the harness wires to the ecu wires. This diagram is ONLY for showing what each color means and whether the wire should be cut or spliced. The diagram above actually tells you where to wire them on the car.

Enjoy, ~gearbox.

Also you should know that the air/fuel ratio most likely cannot be adjusted because the ecu on 03-04 civics will adapt and counter any changes made with the vafcII over time. So I guess it's still useful to monitor engine functions like rpm, voltage, etc. This has yet to be proven with actual dyno results. ~gearbox

Also keep in mind that it hasnt been proven true yet that the ecus on 03-04 actually counter the changes.. but based on a 1 or 2 peoples experiences they say it does.. we will find out soon enough when somone puts the vafc into there car and get it dynoed and then gets it dynoed again like a year later or so. ~xproductionz

INITIAL SETUP PROCEDURE--Very Important!!

Just after the install is done, you need to set certain functions in order for the vafcII to work with your car. As far as I know, these will work for a D17 1.7L SOHC VTEC engine on 2001-2004 civic EX.

If you started the car without performing this setup, you will need to reset the ecu and start over.

After the install, turn the car to the ON position but do not crank the engine. The vafcII display should now be active.

1) Sensor number IN 06 OUT 06
2) Number of cylinders = 4
3) Throttle position = arrow pointing north-east
4) Vtec number = 3
5) hold down accelerator for 10 secs, then release for 10 secs

Turn off the car and remove the key to save settings. It is now safe to start the car for the first time. There should be no check engine light at all.

DO NOT ever adjust any vafcII settings when the engine is running!! All changes including vtec engagement and fuel tuning must be made when the car is on, but engine is off, as described above.

It is strongly recommended that a dyno be used to measure and adjust the air/fuel ratio for your vehicle. The ideal ratio is 14.7:1 which is best for combustion and emissions.

As a general rule, our cars tend to run lean in the lower rpms and rich in the upper rpms, although this is not always true.

Have fun, ~gearbox.

Rule of thumb everyone... If u can... SOLDER the wires together cause based on exerperience i have had it where the connectors they provide come loose.. and it has happened to me on my 98 civic and actually blew my ecu... if u cant do it during the install now then u might want to put that on ur TO-DO-LIST for the future.. ~xproductionz

[EDIT]
here is where it is from
http://www.7thgencivic.com/forums/sh...highlight=vafc

its for a 7th gen but just thought it would help some one

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here is more crap
http://honda-tech.com/zerothread?id=1303493

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here is for a mr2 turbo
http://my.prostreetonline.com/howto/...p?articleid=14

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rsx
http://my.prostreetonline.com/howto/...sp?articleid=7

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here is for preludes
http://www.ntpog.org/mods/fifth-afc/wiring.shtml

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saturns 91-99
http://www.turbosaturns.net/articles/SAFC%20install.htm

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