wideband O2 operation

[beppomarx]

ok guys someone who knows about wideband O2 voltage readings or electrical diagrams PLEASE help me out. i want to know if the O2 sensor in the new setups are REALLY a wideband operation, and from the sounds of it, it should be.

go to http://www.hmaservice.com/webtech/default.asp

click on 'Elantra' then '2004' then 'All Engines' and then into the TSB tab at the top.

then '36 - Engine Electrical'

then '03-36-014-01 Service Information for SULEV Elantra'

now scroll down to page 15. it shows the diagram for the electrical voltage output vs mixture ratio. theres 'Vs cell voltage' and 'IP Current.' i am hoping the IP current is the output reading, looks like it operates from .2v to about .8v- i am on my way to find out more about regular wideband sensor voltages and maybe find what i need, i just want reassurance. hopefully these sensors can be had not too expensive, maybe even second hand somehow soon.

page 16 also describes it more i just wanted some of the guru's to back it up.

i may have 3 O2 sensors on my car soon X):

[i8acobra]

I don't think any Hyundai's have a wideband. Wideband's are 5V sensors, not 1V.

[Acid7711]

Hmmm...Any cars come with these stock? I would dought it, but who knows.

[beppomarx]

i dunno bud... read the article i posted. on page 16 is says:

"The typical oxygen sensor (zirconia O2 sensor)
(as used in most hyundai vehicles (including the non-SULEV Elantra)
works essentially as a 'switch'
......

The Linear Oxygen Sensor
has the ability not only to indicate if the mixture is rich or lean but how rich or lean the mixture is"

also states that
"although the linear O2 sensors signal to the ECM is a variable current, this information is NOT available for diagnostic purposes.
the ECM processes the current information and outputs a variable voltage signal which CAN be used for diagnostic purposes.
the signal range is 0-5 volts
in the case of the linear O2 sensor ised one the XD SULEV, a stoichiometric mixture equals about 2.0 volts.
a LEAN mixture is indicated by a HIGH voltage (like the titanium sensor)
a RICH mixture is indicated by a LOW voltage (like the titanium sensor)"

so basically there is an output in the new SULEV vehicles where you can hook up a true wideband AF guage and get an accurate, useable signal. The O2 sensor itself is specific to >1v but the output signal from the ECM is congruant with any other wideband sensors output. b0ner!!!!


its the SULEV and it makes sense. how are you gonna control the VVT??? sure you can plot out a set graph for load vs RPM but the most efficient way is to tune in real time. no way to get an accurate reading out of a conventional O2 so use a wideband one. all you would need to do is get an analog voltmeter with a 1v max and mark the reading, looks like .5v that is equivalent to 14.7:1AF and corresponding marks for 10, 11, 12, 13:1 etc markings and you could have a cheap solution for tuning and monitoring your engine.

someone please read the article and tell me if this makes sense...

[i8acobra]

Wideband voltage range is 0-5V. I had a voltmeter in my T/A. I had it attached to a regular O2 sensor. The general rule is that, at full throttle, you want to see .85-.87V in an N/A car and .90V in a turbo car.

[JonGTR]

The old Honda hatches, CX, VX or something like that, came with a wideband stock. But more than likely if you find one, it'll be too old to use. If you search, you'll find out more about it.

[Edited by JonGTR on Jan 29, 2004 5:37 AM]

[qtiger]

Originally posted by JonGTR
[body]
The old Honda hatches, CX, VX or something like that, came with a wideband stock. But more than likely if you find one, it'll be too old to use. If you search, you'll find out more about it.
[Edited by JonGTR on Jan 29, 2004 5:37 AM]
[/body]

VX came with a UEGO sensor. The sensors are discontinued and damn near impossible to find for a reasonable price these days. I've seen them sell for $300+... at which price you can buy one of AEM's new UEGO kits with sensor included.