Have an autometer a/f gauge just wondering what wire on my o2 sensors is my signal wire or the one I have to splice into?
Thanks
Thanks
Installing A/F Ratio Guage
- Thread starter 91five-o
- Start date
From the Innovative LM-1 manual
Typically the 3 wires are: heater power, Ground, and sensor element connection.
Generally they have 1 black wire and 2 white wires. Connect the black wire from the EFI
computer to analog output 1 of the meter. Leave the other wires unconnected but make sure they
cannot contact any metal parts or see above. If the wiring colors are different, then heater power
can simply be determined by measuring the voltage on the wires when the engine is running. The
wire showing 12V or more is the heater power. The sensor element connection voltage fluctuates
around 0.45V when the car is warmed up. Wire analog output 1 directly to this wire. The Ground
connection has low resistance to chassis ground (less than 1 Ohm). Measure while the engine is
off.
Typically the 3 wires are: heater power, Ground, and sensor element connection.
Generally they have 1 black wire and 2 white wires. Connect the black wire from the EFI
computer to analog output 1 of the meter. Leave the other wires unconnected but make sure they
cannot contact any metal parts or see above. If the wiring colors are different, then heater power
can simply be determined by measuring the voltage on the wires when the engine is running. The
wire showing 12V or more is the heater power. The sensor element connection voltage fluctuates
around 0.45V when the car is warmed up. Wire analog output 1 directly to this wire. The Ground
connection has low resistance to chassis ground (less than 1 Ohm). Measure while the engine is
off.
BLOWN 5.0 FOX
Member
_jb_
New Member
I tired the "black" wire, WRONG WIRE! Your best bet is to try the black wire, but be ready to splice into another wire.
Black 93 Fox
Active Member
Use 43 (Dark Blue/Lt Geen 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 weatherproof 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)
http://www.veryuseful.com/mustang/t...91eecPinout.gif
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.
AutoZone wiring diagrams
http://www.autozone.com/servlet/UiB..._us/0900823d/80/16/71/3c/0900823d8016713c.jsp for 79-88 model cars
http://www.autozone.com/servlet/UiB..._us/0900823d/80/19/59/5a/0900823d8019595a.jsp for 89-93 model cars
http://www.autozone.com/servlet/UiB..._us/0900823d/80/1d/db/3c/0900823d801ddb3c.jsp for 94-98 model cars
See the following website for some help from Tmoss (diagram designer) & Stang&2Birds (website host)
http://www.veryuseful.com/mustang/t...91eecPinout.gif
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.
AutoZone wiring diagrams
http://www.autozone.com/servlet/UiB..._us/0900823d/80/16/71/3c/0900823d8016713c.jsp for 79-88 model cars
http://www.autozone.com/servlet/UiB..._us/0900823d/80/19/59/5a/0900823d8019595a.jsp for 89-93 model cars
http://www.autozone.com/servlet/UiB..._us/0900823d/80/1d/db/3c/0900823d801ddb3c.jsp for 94-98 model cars
Curse
Member
You can get that gauge to tell you your real A/F ratio with this kit.
http://www.dynotunenitrous.com/store/Scripts/prodView.asp?idproduct=151
http://www.dynotunenitrous.com/store/Scripts/prodView.asp?idproduct=151
StangSpeed
New Member
tru dat....i just went through the same crap...lol gas no gas..lol im gonna order the controller...
I am trying to find a nice combination of features in a wide band. Non-outrageous price (if possible), Output to a Gauge (with kit, or connects and translates output to Autometer AFR gauge), and rpm based data logging (without laptop - removable recorder to hook up to desktop PC to recover data)
Does such a product exist or am I just dreaming?
Does such a product exist or am I just dreaming?
A wideband is an oxygen sensoring system, looking very similar to stock O2 sensors, that provides advanced monitoring of exhaust gases. It is more detailed and accurate than a narrowband, which is what stock O2 sensors are.
You can adjust it several ways, varying from fuel pressure regulators, changing injectors, having a chip burned, or a handheld tuner (PMS or Tweecer).
You can adjust it several ways, varying from fuel pressure regulators, changing injectors, having a chip burned, or a handheld tuner (PMS or Tweecer).
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