Air/Fuel Ratio Gauge Installation help
- Thread starter 8urchevy
- Start date
strtrcr50
New Member
strtrcr50
New Member
strtrcr50
New Member
It's a light show. It's not very accurate. You should get a wideband and install that. That being said, depending if you want the left side or right side, use pin 43 or pin 29
Pin 43 is dark blue with light green
Pin 29 is dark green with pink
Here's the wiring diagram stolen from Jkrichter. I really don't recommend using the gauge you have tho.
Pin 43 is dark blue with light green
Pin 29 is dark green with pink
Here's the wiring diagram stolen from Jkrichter. I really don't recommend using the gauge you have tho.
Attachments
The A/F gauges that use the O2 sensor signal will jump all over the place. The reason is that the O2 sensors "switch" between
.2 volt lean and .6 volt rich with a curve that looks like the drop off a high cliff. The curve is almost straight up and down, so the
voltage shoots from .2 to .6 and back down . again 2 or more times a second at cruse. You won't get much useful information
except when the mixture is extremely lean or extremely rich, there is no middle ground.
Use 43 (Dark Blue/Lt Green wire) or pin 29 (Dark Green/Pink wire ) on the computer. Use Wire tap-ins from Radio shack P/N 64-3052.
The computer is located under the passenger side kick panel. That keeps you from having to crawl under the car and make a weather
proof splice in the wiring. You can use either one, or run a SPDT switch and use both. Then you can use the switch to select which side
to view.
See the following website for some help from Tmoss (diagram designer) & Stang&2Birds (website host)
Computer, actuator & sensor wiring
http://www.veryuseful.com/mustang/tech/engine/images/88-91_5.0_EEC_Wiring_Diagram.gif
AutoZone wiring diagrams
http://www.autozone.com/az/cds/en_us/0900823d/80/16/71/3c/0900823d8016713c/repairInfoPages.htm for 79-88 model Mustangs
http://www.autozone.com/az/cds/en_us/0900823d/80/19/59/5a/0900823d8019595a/repairInfoPages.htm
for 89-93 model Mustangs
http://www.autozone.com/az/cds/en_us/0900823d/80/1d/db/3c/0900823d801ddb3c/repairInfoPages.htm for 94-98 model Mustangs
.2 volt lean and .6 volt rich with a curve that looks like the drop off a high cliff. The curve is almost straight up and down, so the
voltage shoots from .2 to .6 and back down . again 2 or more times a second at cruse. You won't get much useful information
except when the mixture is extremely lean or extremely rich, there is no middle ground.
Use 43 (Dark Blue/Lt Green wire) or pin 29 (Dark Green/Pink wire ) on the computer. Use Wire tap-ins from Radio shack P/N 64-3052.
The computer is located under the passenger side kick panel. That keeps you from having to crawl under the car and make a weather
proof splice in the wiring. You can use either one, or run a SPDT switch and use both. Then you can use the switch to select which side
to view.
See the following website for some help from Tmoss (diagram designer) & Stang&2Birds (website host)
Computer, actuator & sensor wiring
http://www.veryuseful.com/mustang/tech/engine/images/88-91_5.0_EEC_Wiring_Diagram.gif
AutoZone wiring diagrams
http://www.autozone.com/az/cds/en_us/0900823d/80/16/71/3c/0900823d8016713c/repairInfoPages.htm for 79-88 model Mustangs
http://www.autozone.com/az/cds/en_us/0900823d/80/19/59/5a/0900823d8019595a/repairInfoPages.htm
for 89-93 model Mustangs
http://www.autozone.com/az/cds/en_us/0900823d/80/1d/db/3c/0900823d801ddb3c/repairInfoPages.htm for 94-98 model Mustangs
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