Wideband?
- Thread starter poie
- Start date
- :
- 2002 BJFW, 2007 BK3P, 1979 SA22C, 2005 BK3P
a wideband is a five volt oxygen sensor used to get a more precise air/fuel ratio over a stock narrowband sensor. most factory o2 sensors are single volt sensors that, when combined with your average air/fuel gauge, provide little more than a light show.
So it is the same sensor just two different outputs, one 5v and a 1v? What would be the purpose of simultaneously outputting two signals at once? One goes to the stock ECU but then what is the purpose of the 5v signal, where is it going to?
Sorry if I'm being a PITA but I find engine managment a fascinating subject albeit confusing as hell sometimes...
cheers
Sorry if I'm being a PITA but I find engine managment a fascinating subject albeit confusing as hell sometimes...
cheers
If you had a standard ecu, the use of a wideband O2 sensor would be somewhat dubious at best... it could tell you something's going wrong, but wont give you any means to fix it!
Basically, with a standard ecu, you'd leave your normal O2 sensors hooked upto the ECU so it can do its thing, and hook up the wideband to a gauge. This gauge would tell you if you are too rich or too lean essentially.
Where wideband comes into its own is with aftermarket ECU/piggy back tuning - because you can take the information the gauge gives you and apply it to your tune (too lean, add more fuel, too rich, take some out etc).
It is a totally different sensor...
the narrow band sensors are basically give you 3 signals, "lean" "stoich" and "rich"... wont tell you how lean, or how rich.
with the wideband sensor, it outputs a signal between 0 and 5 volts, and i think to a precision of 2 decimal places (one of the bigger ECU guru's will likely correct me on this....)....
Basically, with a standard ecu, you'd leave your normal O2 sensors hooked upto the ECU so it can do its thing, and hook up the wideband to a gauge. This gauge would tell you if you are too rich or too lean essentially.
Where wideband comes into its own is with aftermarket ECU/piggy back tuning - because you can take the information the gauge gives you and apply it to your tune (too lean, add more fuel, too rich, take some out etc).
It is a totally different sensor...
the narrow band sensors are basically give you 3 signals, "lean" "stoich" and "rich"... wont tell you how lean, or how rich.
with the wideband sensor, it outputs a signal between 0 and 5 volts, and i think to a precision of 2 decimal places (one of the bigger ECU guru's will likely correct me on this....)....
poie said:
The 5v gets translated and output to your gauge. As lordworm said, the 0-5v range gives you much, much greater accuracy.
I still think with a stock ECU it's useful if you are boosted so you can look down and say "damn, I'm not getting enough fuel at that rpm and that boost level.. I should probably buy a decent ECU"
