This applies to cars that are not already pre-wired for vtec.

There are a few similar topics on this but I thought we could

use one with a simple explaination and pics as well.


What you will need

1.Soldering gun
2.Solder
3.16-18 guage electical wire (7 feet apprx.)
4.1 big pin for ecu harness (A4 Vtec Soleniod)
5.1 small pin for ecu harness (D6 Vtec Oil Pressure Switch)
6.3/8 ratchet
7.10 mm socket
8.4-5 in extension
9.Connector for Vtec Solenoid
10.Connector for Vtec OP Switch
11.Heat Shrink tubing (8 inches or so)
12.Electrical Tape
13.Phillps Screwdriver (optional)
14.Convoluted tubing (3-4 feet optional)

Here's a pic of some of the stuff I listed


1.Start by removing the negative battery cable.
2.Remove 6 screws holding the Glove Compartment in and then remove.
I'm not running A/C, so I chose to remove the glove compartment and
evaporator to gain access to the big hole on the firewall to route my wiring through.
You may choose to route it through another source in the firewall but I found this
to be the easiest way.
3.Pull carpet back
4.Remove 6, 10mm nuts holding in the kick panel that covers the ECU.
5.Remove kick panel.
6.Remove 4, 10mm bolts holding in the ECU and then remove the ECU.

Onto the Wiring.
7.Cut 2, 3 1/2 foot long wires from the 16-18 guage electrical wire.
If you are routing your wire through the firewall from a smaller opening
that the pins can not fit through, then route the wiring through the firewall after you cut the wires. If you choose to do it this way, be careful when
soldering your connections.
8.Start with the Vtec Solenoid connector.
Feed 2 in of heat shrink tubing through the wire then connect the wiring on
the connector to one end of the 16-18 guage electrical wire.
Then wrap the solder around the wiring connection you just made.
Melt the solder and then slide the heat shrink tubing over your connection.
Then connect the big pin (for the ecu harness/A4) to the other side of the
16-18 guage electrical wire
Take a look at the connection in the pic (nevermind the quadzilla in the backround)


9. Repeat the process for the Vtec OP Switch.
The connector for the Vtec OP Switch will have two wires. (one blue/one black)
The blue wire is hot, connect this to the 16-18 electrial wire.
The black one is for the ground, just connect this wire to the ground
on the thermostat housing where the other ground wire is.

After you heat shrink and electrical tape all of your connections,
they should look something like this.

10.Route the pins through the firewall to connect to the ECU harness.
Plug the pins into the appropriate position in the harness
Big Pin A4
Small Pin D6
Here's a pic of me inserting the A4 pin

11.After you have finished that, you can plug in the connectors to the
Vtec Soleniod and the Vtec OP Switch and then ground off the black wire
for the OP Switch.
I am using the h23 harness so I had to cut the connectors off of my jdm h22
harness. You will need these connectors to perform the procedure.
Another pic

12.Plug in ECU
13.Reconnect battery cable
14.Reconnect intake (i removed this because it makes things easier to work on)
15.Start car, make sure there is no check engine lights
let the car warm up, go test VTEC

If everything goes smoothly, bolt down the ecu and kick panel and reinstall
everything in reverse order and you're good to go.


Special thanks to Keith (CHK4TIX) for information on the installation procedure.

Also check out jdmlude dude's thread on vtec wiring for further information
https://honda-tech.com/zerothread?id=833163

And Satan's thread for ecu pinouts
https://honda-tech.com/zerothread?id=918703

Disclaimer: The author is not responsibile for any mistakes
that may occur during installation




Modified by SKDRCR at 12:18 PM 9/28/2004

 

sweet write up bro!

 

very good write up. I had to do a little more to wire it up to my S. Pretty much did the same way you did. I like the shocker in the third picture

When I ran the wires down, I used the same route that the harness took. I removed the fusebox and cut the tape off the grommet. Then I taped up the wire to a coat hanger and pushed it through. It was a pretty easy way to get the wires in there and have it look clean.

I think the extra two wires on the S are the knock sensor and VTM.

 

"This applies to cars that are not already pre-wired for vtec."

So this means preparing your car for say an H22A swap, not converting an F22A to VTEC...right? Sorry it sounds newbish but that grabbed my attention.

 

SKD ill put this write up to use tommorow ^^ thanks peace.

 

yeah, it means wiring a H22A up to a Prelude that was not equiped with one stock.

 

Saving this for later

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Shakes &raquo;</TD></TR><TR><TD CLASS="quote">sweet write up bro!</TD></TR></TABLE>

thanks Doug

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by OEM_ASSASSIN &raquo;</TD></TR><TR><TD CLASS="quote">
When I ran the wires down, I used the same route that the harness took. I removed the fusebox and cut the tape off the grommet. Then I taped up the wire to a coat hanger and pushed it through. It was a pretty easy way to get the wires in there and have it look clean.

I think the extra two wires on the S are the knock sensor and VTM. </TD></TR></TABLE>

Nice, It also looks cleaner if you put the wires in convoluted tubing
which i will do when as soon as I get some.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by samsteinf22a &raquo;</TD></TR><TR><TD CLASS="quote">"This applies to cars that are not already pre-wired for vtec."

So this means preparing your car for say an H22A swap, not converting an F22A to VTEC...right? Sorry it sounds newbish but that grabbed my attention.</TD></TR></TABLE>

It would also apply here as well

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by GOTNOS &raquo;</TD></TR><TR><TD CLASS="quote">SKD ill put this write up to use tommorow ^^ thanks peace.</TD></TR></TABLE>

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BoostedH23Accord &raquo;</TD></TR><TR><TD CLASS="quote">Saving this for later</TD></TR></TABLE>

 

nice write up. glad to see i could help, even if is was just a little

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CHK4TIX &raquo;</TD></TR><TR><TD CLASS="quote">nice write up. glad to see i could help, even if is was just a little </TD></TR></TABLE>

Thanks again Keith

If anybody else has anything to add to this feel free

 

my ecu pic with the CHK4TIX wire kit also mentioned in this post.

http://www.imagestation.com/pi...g.jpg

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by GOTNOS &raquo;</TD></TR><TR><TD CLASS="quote">my ecu pic with the CHK4TIX wire kit also mentioned in this post.
</TD></TR></TABLE>

let me help with that. (you left the .orig.jpg)

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CHK4TIX &raquo;</TD></TR><TR><TD CLASS="quote">After assisting a few people with this, as well, I decided today to make this and include it in this thread. I decided to do this after i was talking to GOTNOS. Hopefully whit will help some one out.

if you want to see the full size veiw, just open in a new window and put .orig.jpg after it. Or i can email it to you if needed


</TD></TR></TABLE>


Very nice

I was looking for an image like that.

 

so this is not to make a f22a1 have vtec? only a h22a?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by korney &raquo;</TD></TR><TR><TD CLASS="quote">so this is not to make a f22a1 have vtec? only a h22a?</TD></TR></TABLE>

it's only for if you are putting a VTEC engine into a non-vtec car.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Shakes &raquo;</TD></TR><TR><TD CLASS="quote">

it's only for if you are putting a VTEC engine into a non-vtec car.</TD></TR></TABLE>

oh ok thanks for the clear up

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by korney &raquo;</TD></TR><TR><TD CLASS="quote">so this is not to make a f22a1 have vtec? only a h22a?</TD></TR></TABLE>

To get vtec in a F22a1, you'll need a lot more than a few wires. You'll need either an engine or a vtec head for starters. Then search for the H22 head + F22 block threads. There are quite a few roaming around on honda-tech as well as cb7tuners.com.

 

ill be using this for my gsr swap in my 94 ls

 

What do you push the pins in with? I followed your instructions and it worked great, and thank you for that, but the pins I pushen into the plugs don't look like they go as far in as the others, like they kinda stick out a little

 

good idea, baller. Bambino.87@hotmail.com

 

So this would work if i am converting an OBD1 F22 non-Vtec harness to Vtec ??

 

yes

use your brain, go to school, read a book, do something...holy ****

 

and what do you think i'm doing nemrod

 

my vtec solenoid only has one wire on it. it is a '97 JDM type R. why does it only have one wire? Of the other two GSR's that i've owned, both had 3 wires and 2 clips. i thinking about switching the a GSR solenoid.

 

Where do you get these pins? The Honda dealer is clueless and says they must sell me the entire wire harness.


4.1 big pin for ecu harness (A4 Vtec Soleniod)
5.1 small pin for ecu harness (D6 Vtec Oil Pressure Switch)