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Canadian Mustang Owners Club - Ford Mustang Forums (https://www.cmoc.ca/)
-   4.6L 4v (https://www.cmoc.ca/4-6l-4v-3/)
-   -   O2 Sensors and A/F Ratio (https://www.cmoc.ca/4-6l-4v-3/o2-sensors-f-ratio-732/)

03GreyMach1 02-01-2005 10:45 AM
Originally Posted by Scotts88
If you take it to get it tuned, they usually have a a/f meter whick they put down your tail-pipe. This is a wide band 02 sensor. They tune with that. They remove it when theyre done tuning the car.

If you buy a wide band 02, then you weld in a bung after the cats or around that area and install the sensor. This remains there all the time as you have a guage and can constanty monitor the a/f reading.

Some dyno shops will weld a bung in and install the sensor and simply remove it and plug it when done.
OK, I still go back to my original concern or question, if the stock O2 sensors are not capable of the readings a wideband sensor is how can you accurately keep that tune if the computer see the stock O2 sensor readings? :banghead:

P.Meister 02-01-2005 11:07 AM
fir tuning, we use a wideband Sensor. It measures from 6-10

03GreyMach1 02-01-2005 11:42 AM
Originally Posted by meister@steeda.ca
fir tuning, we use a wideband Sensor. It measures from 6-10
6-10 ? volts?

P.Meister 02-01-2005 12:28 PM
Originally Posted by 03GreyMach1
6-10 ? volts?
meant to say

6.0:1-17.0:1 A/F

Dech #009 02-01-2005 02:25 PM
Originally Posted by Scotts88

If you buy a wide band 02, then you weld in a bung after the cats or around that area and install the sensor.
The bung, O2 is positioned/welded in before the cats, not after.

Scotts88 02-01-2005 07:41 PM
Originally Posted by Dech #009
The bung, O2 is positioned/welded in before the cats, not after.
Your right. i mixed it up! thanks! :tup

Dech #009 02-01-2005 08:04 PM
Originally Posted by Scotts88
Your right. i mixed it up! thanks! :tup
I've mixed plenty up myself..numerous times! :cheers:

BrownBrosPerf 02-03-2005 12:26 AM
Factory O2 is a narrow band oxygen sensor, the factory computer only cares that it switches back and forth, from .8 or so to .2 or .3 and that it doesnt stay to one extreme or the other for to long. It uses that to make sure it is opperating in it's programed parameters. When we use a wide band O2 we are reading so as to adjust the parameters in the computer (not really concerned with factory O2's at that point) so we need to actually see where we are at for acutal air/fuel. As for wide band o2 sensors, I personally would test with one if I was playing with my tune (ie. on Pred or SCT) and remove it when just driving around. Wideband sensors have a limited life and are fairly expensive to keep replacing.
O and most widebands read to much higher than 17.0:1

03GreyMach1 02-03-2005 06:41 AM
Originally Posted by BrownBrosPerf
Factory O2 is a narrow band oxygen sensor, the factory computer only cares that it switches back and forth, from .8 or so to .2 or .3 and that it doesnt stay to one extreme or the other for to long. It uses that to make sure it is opperating in it's programed parameters. When we use a wide band O2 we are reading so as to adjust the parameters in the computer (not really concerned with factory O2's at that point) so we need to actually see where we are at for acutal air/fuel. As for wide band o2 sensors, I personally would test with one if I was playing with my tune (ie. on Pred or SCT) and remove it when just driving around. Wideband sensors have a limited life and are fairly expensive to keep replacing.
O and most widebands read to much higher than 17.0:1
Thanks, good information. So what would you say the factory sensor is good for as far as fuel ratio? 12- 16 or ???

Dech #009 02-03-2005 09:34 AM
Widebands aren't that expensive anymore. You can get them for $50 now.


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