O2 Sensors and A/F Ratio
Thread Starter
CMOC Addict
Joined: Oct 2004
Posts: 711
From: on the bottom!
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.
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.
CMOC Rookie
Joined: Dec 2004
Posts: 89
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
O and most widebands read to much higher than 17.0:1
Last edited by BrownBrosPerf; Feb 3, 2005 at 12:30 AM.
Thread Starter
CMOC Addict
Joined: Oct 2004
Posts: 711
From: on the bottom!
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
O and most widebands read to much higher than 17.0:1
