Narrowband O2 sensor
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Junior Member
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Narrowband O2 sensor
I wired up my turbo timer to read the o2 sensor voltage so I can get a theoretical reading of if im lean or not... When I run my car, the voltage jumps around .15 v to .93 volt and all... what is the problem?? How can I know what voltage if it jumps around like crazy?
and there is also a A/F option on the turbo timer... I put it on and it shows values that look real... How do I know if a wideband o2 sensor is already on my car?
and there is also a A/F option on the turbo timer... I put it on and it shows values that look real... How do I know if a wideband o2 sensor is already on my car?
Honda-Tech Member
Joined: Sep 2002
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From: 808 State
Re: Narrowband O2 sensor (AZNracerx1989)
apex'i pencil-type,correct?
this chart might offer you some help as to how to read the voltage values in relation to 'theoretical' air/fuel ratios...
here's a chart for the wideband air/fuel ratio in relation to o2 voltage readings
follow your downpipe from the turbo's exhaust housing flange ... a wideband o2 sensor would be installed about 4-5 inches downstream.
this chart might offer you some help as to how to read the voltage values in relation to 'theoretical' air/fuel ratios...
here's a chart for the wideband air/fuel ratio in relation to o2 voltage readings
follow your downpipe from the turbo's exhaust housing flange ... a wideband o2 sensor would be installed about 4-5 inches downstream.
Mr. Badwrench
Joined: May 2002
Posts: 14,146
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From: stranger in a strange land
Re: Narrowband O2 sensor (AZNracerx1989)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AZNracerx1989 »</TD></TR><TR><TD CLASS="quote">How do I know if a wideband o2 sensor is already on my car?</TD></TR></TABLE>
a true wideband will have a 5 wire sensor.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by H22 CD5 »</TD></TR><TR><TD CLASS="quote">
follow your downpipe from the turbo's exhaust housing flange ... a wideband o2 sensor would be installed about 4-5 inches downstream.</TD></TR></TABLE>
not to flame or argue but if i remember from my aem uego install it recomended atleast 18" - 36" down stream from the turbine for heat issues.
a true wideband will have a 5 wire sensor.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by H22 CD5 »</TD></TR><TR><TD CLASS="quote">
follow your downpipe from the turbo's exhaust housing flange ... a wideband o2 sensor would be installed about 4-5 inches downstream.</TD></TR></TABLE>
not to flame or argue but if i remember from my aem uego install it recomended atleast 18" - 36" down stream from the turbine for heat issues.
Joined: Sep 2002
Posts: 1,371
Likes: 1
From: Planet BOOOST
Re: Narrowband O2 sensor (AZNracerx1989)
This topic has been beaten to death. If you search you will have plenty to go on.
If you want to monitor AF, FORGET aout using the oem O2 narrowband for reasons already mentioned and you can also see from the graph why. It DOES NOT give you an indication of how lean/rich you are. All it tells you is that you are not running stoich, THATS IT..... U could be very lean or you could be very rich.....
Advice - Get a wideband.
If you want to monitor AF, FORGET aout using the oem O2 narrowband for reasons already mentioned and you can also see from the graph why. It DOES NOT give you an indication of how lean/rich you are. All it tells you is that you are not running stoich, THATS IT..... U could be very lean or you could be very rich.....
Advice - Get a wideband.
Mr. Badwrench
Joined: May 2002
Posts: 14,146
Likes: 2
From: stranger in a strange land
Re: Narrowband O2 sensor (AZNracerx1989)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AZNracerx1989 »</TD></TR><TR><TD CLASS="quote">but the voltage jumps around like crazy... how can I know which volt its at??</TD></TR></TABLE>
it is normal for a narrowband to fluctuate from .1 to .9 volts.
it is normal for a narrowband to fluctuate from .1 to .9 volts.
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