Welcome to the North American Subaru Impreza Owners Club Thursday November 23, 2017
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
Go Back   NASIOC > NASIOC Technical > Electrical & Lighting

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads. 
Thread Tools Display Modes
Old 10-24-2005, 02:01 PM   #1
Scooby Newbie
Member#: 88963
Join Date: Jun 2005
2005 WRX

At the Track Need help with A/F Gauge hookup

I know this should be simple but it's giving me some trouble. First, i have an autometer sportcomp digital a/f gauge. There are three wires, red - 12v ignition, black - good engine ground, and purple - signal wire. I have an 05 WRX. I hooked the red wire to the ignition wire from the clock wires, the ground to the ground on the clock wires, and the purple wire to the #17 on B135, where it's supposed to go according to the ECU pinout pages I found.

The problem is that it is getting power because the green light farthest on the rich side lights up but that's all, no other ones and it doesn't change. (My car is basically stock and I know it cant be running THAT rich.) I tried it without the signal wire too and it did this same thing so that leads me to believe that there is something wrong with the way I hooked up the signal.

All I did was strip a little off of #17 on B135 (The only connector with 10 pins across. I think it was a white wire with a black stripe. It was in the middle row of the connector, third one in from the left.) and splice in the wire with a little bit of solder. (Which probably voided a lot of my warranty right?)

Would this be the correct way to install it? Do I have to program it somehow or anything? If this is all correct, I guess I will just recheck all the wires.
* Registered users of the site do not see these ads.
maxpower_454 is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 10-24-2005, 02:44 PM   #2
Scooby Newbie
Member#: 95154
Join Date: Sep 2005
Location: Minnesota
2005 Subaru WRX STi


I thought it was best to use a wideband sensor for A/F like the bosch or VW... the narrowband which is what the car uses is basically a yes / no feedback of rich / not rich. I'f I'm wrong on the above I'm sure someone will correct me.
krees23 is offline   Reply With Quote
Old 10-24-2005, 02:52 PM   #3
Scooby Newbie
Member#: 88963
Join Date: Jun 2005
2005 WRX


Yes I realize a wideband is better, I'm just asking advice on hooking up a narrowband, not advice on which gauge is better
maxpower_454 is offline   Reply With Quote
Old 10-27-2005, 06:13 PM   #4
RIP 10/12/83 to 02/10/08
Scooby Specialist
Member#: 83254
Join Date: Mar 2005
Chapter/Region: NWIC
Location: Roy, Washington
98 2.5 RS
04 WRX


I'm not sure what Pin that is for. You hooked it up to the rear O2 sensor correct? The WRX's front O2 sensor isn't strictly narrow band. It is more like somewhere between wideband and narrow. If you hooked it up to the front O2 sensor then that would cause it to light green only.

Also if you hooked it to the wrong wire that would cause it too, anything that is outputting more than 1v will make it just light green.

I installed my Autometer AFR gauge last weekend, but i didn't have any problems.
Master2192 is offline   Reply With Quote
Old 10-28-2005, 10:33 AM   #5
Scooby Guru
Member#: 47769
Join Date: Nov 2003
Chapter/Region: MWSOC

You llikely have the wrong wire. I would direct you to Jorge's site that has the info, but I don't remember what the site address is.
subieworx is offline   Reply With Quote
Old 10-28-2005, 11:09 AM   #6
Scooby Newbie
Member#: 99411
Join Date: Oct 2005
Location: Tennessee
03 wrx


i dont know if you want to hear this but on the 03 you have to buy a aftermarket 02 sensor to make it work. check the autometer website i dont know if it is the same for the 04 and 05 hope you get it working....
wrx15psi is offline   Reply With Quote
Old 11-01-2005, 02:23 PM   #7
Scooby Specialist
Member#: 88254
Join Date: May 2005
Chapter/Region: TXIC
Location: Spring, TX

i had the same prob. First off DONT SPLICE INTO THE ECU. Splice into the wire underneath ur car by the rear cat. You will see a yellow cover housing 4 wires. I think 2 were black, one was blue, and one is white. Tap into the blue wire, run it up to the car through the firewall, and thats it. It still wont read right bc it is a narrowband gauge, but it will do what its supposed to do. That ECU diagram u are lookin at is WRONG. I tried to do it and there is no #17 on a B135 connector, it is blank. Good luck my man, and by the way this does work, its on my car like this now.
anthony_delprete84 is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Need help with Autometer boost gauge Takumi.wRx Motorsports 4 02-16-2004 11:30 PM
Need help with turbo boost gauge! JDMSubaru Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 7 12-10-2003 04:29 PM
Need help with Autometer EGT gauge wrxlvr Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 8 07-31-2002 07:10 PM
Need help with GReddy EGT gauge dandbest Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 3 07-23-2002 08:23 PM
Need Help with my STI Gauge Cluster! STAT!!! adamsrs Normally Aspirated Powertrain 1 11-07-2001 08:12 PM

All times are GMT -4. The time now is 07:16 PM.

Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2017 Axivo Inc.
Copyright ©1999 - 2017, North American Subaru Impreza Owners Club, Inc.