Hello all!
I'm getting very erratic readings from my O2 sensor. The gauge will fluctuate wildly from 22.4 to 8.2. I've calibrated the sensor (Innovate MTX-L wideband. Perhaps the sensor is located too close to the collector. The information that came with the gauge specified mounting the sensor bung 24 inches from header collector. My exhaust guy placed it about 4 inches from collector. Could this be the problem? Any thoughts?
Thanks,
Bob
Oxygen Sensor Position
Moderators: jsmcortina, muythaibxr
-
- Helpful MS/Extra'er
- Posts: 121
- Joined: Mon Jun 13, 2011 11:01 am
- Location: Inland Empire Southern California
-
- Super MS/Extra'er
- Posts: 1986
- Joined: Sat Jul 22, 2006 8:02 pm
- Location: Eureka, NV USA
- Contact:
Re: Oxygen Sensor Position
4 inches downstream from the collector?
An exhaust leak upstream from the sensor can cause the problem you describe.
Ken
An exhaust leak upstream from the sensor can cause the problem you describe.
Ken
1979 Corvette - 383 CID SBC w/ Holley Pro-Jection 900 CFM TBI, 4-85 lb lo-z injectors & Walbro 255 pump
MS2 v3 w/extra 3.4.2 Release
36-1, Delphi LS2/7 coils in wasted spark, driven by v2.0 logic board from JBPerformance
Spartan Lambda Sensor from 14point7
TinyIOX from JBPerformance
MS2 v3 w/extra 3.4.2 Release
36-1, Delphi LS2/7 coils in wasted spark, driven by v2.0 logic board from JBPerformance
Spartan Lambda Sensor from 14point7
TinyIOX from JBPerformance
-
- Helpful MS/Extra'er
- Posts: 121
- Joined: Mon Jun 13, 2011 11:01 am
- Location: Inland Empire Southern California
Re: Oxygen Sensor Position
Yup, 4 inches downstream from the collector. No exhaust leaks though...
-
- Super MS/Extra'er
- Posts: 17507
- Joined: Thu Apr 16, 2009 8:08 pm
Re: Oxygen Sensor Position
How far is it from the exit of the exhaust - is this one running nearly open headers, or a full length exhaust?
Matt Cramer -1966 Dodge Dart slant six running on MS3X
Re: Oxygen Sensor Position
You might find this of use:-streetrover wrote:Yup, 4 inches downstream from the collector. No exhaust leaks though...
http://www.wbo2.com/lsu/position.htm
Rover SD1 3.5 EFI
MS2 V3
EDIS
Tech Edge O2
London UK.
MS2 V3
EDIS
Tech Edge O2
London UK.
-
- Helpful MS/Extra'er
- Posts: 121
- Joined: Mon Jun 13, 2011 11:01 am
- Location: Inland Empire Southern California
Re: Oxygen Sensor Position
Entire exhaust pipe (from header collector on each side) is about 5ft, including dual glass-paks.