Installing A/F Ratio Guage

91five-o

New Member

Nov 16, 2002

287

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Maple Ridge British Columbia

Aug 2, 2005

#1

• Aug 2, 2005

• #1

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

 

D

Daggar

New Member

Jul 19, 2004

3,902

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Aug 2, 2005

#2

• Aug 2, 2005

• #2

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.

 

L

luckythirteen13

New Member

Jul 19, 2005

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Anaheim, CA

Aug 2, 2005

#3

• Aug 2, 2005

• #3

its the black one

 

BLOWN 5.0 FOX

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Apr 4, 2005

213

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NORTH SHORE MA

Aug 2, 2005

#4

• Aug 2, 2005

• #4

Get A Wideband!!!!

 

Grn92LX

Fidanza Man!

Founding Member

Jan 14, 2001

6,819

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129

New York

Aug 2, 2005

#5

• Aug 2, 2005

• #5

BLOWN 5.0 FOX said:

Get A Wideband!!!!

Click to expand...

Yup. All that trouble for a gauge that won't tell you shiit is a waste of time and cash.

 

_jb_

New Member

Mar 4, 2004

808

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Michigan, Berrien County

Aug 2, 2005

#6

• Aug 2, 2005

• #6

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

Jun 1, 2003

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Vancouver,Washington

Aug 3, 2005

#7

• Aug 3, 2005

• #7

Best thing to do is get a wide band like said befor.

 

jrichker

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Mar 10, 2000

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Dublin GA

Aug 3, 2005

#8

• Aug 3, 2005

• #8

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

 

S

Sicarius428

Active Member

Jan 6, 2004

2,085

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Aug 3, 2005

#9

• Aug 3, 2005

• #9

If you havn't opened the package try to return it and get a wideband. I have the autometer one and it doesn't really work at all(doesn't give an accurate reading). An autometer clock would have been more usefull.
Kevin

 

Curse

Member

Apr 8, 2004

791

2

16

El Paso, TX

Aug 3, 2005

#10

• Aug 3, 2005

• #10

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

 

L

luckythirteen13

New Member

Jul 19, 2005

648

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Anaheim, CA

Aug 3, 2005

#11

• Aug 3, 2005

• #11

get the wide band. i have one that records into a little computer and i can load it up into my home pc and get a graph up to 44minutes long. i have a narrow band o2 gauge. it says my car is working fine. got the wide band and found out i was running 26:1

 

StangSpeed

New Member

Nov 6, 2005

9

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Austin, Texas

Feb 28, 2006

#12

• Feb 28, 2006

• #12

tru dat....i just went through the same crap...lol gas no gas..lol im gonna order the controller...

 

C

criticman

Member

Sep 7, 2003

723

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16

Rome, GA

Mar 2, 2006

#13

• Mar 2, 2006

• #13

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?

 

J

jrod92

Member

Jun 17, 2004

66

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7

Mar 2, 2006

#14

• Mar 2, 2006

• #14

what is a wideband and after you find out your a/f ratio how do you go about adjusting it?

 

C

criticman

Member

Sep 7, 2003

723

1

16

Rome, GA

Mar 2, 2006

#15

• Mar 2, 2006

• #15

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).