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Let me see your Bung (o2 that is)

Myles

Well-known member
Joined
Aug 8, 2006
Messages
5,264
Location
Skokie, IL
Does anyone have pics of where their bung is welded to their downpipe for the wide band o2 sensor? Thanks Ahead
 

Terry Posten

Well-known member
Joined
Dec 16, 2003
Messages
9,009
Location
Davenport, Iowa USA
I am using the stock location because my WB has a narrow band output. Wired that into my ECU and she runs like a top.

However, my downpipe has a bung in it, plugged of course. It is in the middle of the 90 bend going back.

Here is the most important thing.

You must have the O2 sensor located so that it is not straight "level" or upward pointing. It allows moisture to collect into the sensor when off and it kills it quick. It must have a downward pitch so that the sensor screen can drain.

From what I have read, it must be close enough to stay hot. It needs temps of around 750-800 deg to work correctly and the internal heater is not good enough to do the job completely. I would try and keep it within 1 liner foot of the O2 housing if you are not going to use the stock location.

Good luck.
 

slugsgomoo

Well-known member
Joined
Oct 16, 2003
Messages
3,776
Location
Tacoma, WA
mine said 18-24" from the turbine exit, so it's right just ahead of the steering rack on the drivers side, relatively convenient location. I'll second what Terry is saying about the angle. Mine is at like 1:30-2pm if you're looking towards the back of the car.
 

CP

Well-known member
Joined
Aug 30, 2004
Messages
8,938
Location
West Simsbury, CT
You can barely see it on the top of the DP in this photo, placed just ahead of the firewall at the 10-15* angle specified:

 
Last edited:

Myles

Well-known member
Joined
Aug 8, 2006
Messages
5,264
Location
Skokie, IL
I'm not sure If the Uego lets you use the stock location. In that other newbs thread about my car I think steve said that the computer needs the stock o2 sensor. Does anyone know if the Uego can use the ecu like Terry is talking about?
 

Rausch

Well-known member
Joined
Dec 21, 2004
Messages
12,049
Location
Cleveland, OH
Quote:
Mine is at like 1:30-2pm

hmm...wonder why he didn't mount it in the am positions??? /ubbthreads/images/graemlins/rofl.gif
everyone that i know of on a DSM is shortly after the bend in the down pipe, and all within about a foot of each other. a few guys have had them for quite some time with no failures, and in those 10-2 o'clock positions.(excluding 12 o'clock that is.)
 

stealthtt24

Well-known member
Joined
May 24, 2005
Messages
2,746
Location
Orlando, FL
On a 4G63 powered colt, fwd car but still. AEM UEGO wideband

DigiCampics677.jpg


DigiCampics676.jpg


DigiCampics675.jpg
 

04DrBlur

Well-known member
Joined
Oct 16, 2002
Messages
1,081
Location
Massillon, Oh.
I tried the UEGO in the factory location and could not get the car to idle. My bung is right in front of the steering rack as well and works great.
 

Gordian79

Well-known member
Joined
May 1, 2005
Messages
2,839
Location
Bronx,NY
mine is about where the shifter is at.theres a nice hole with grommet that you can feed wire through right under drivers feet.
 

jepherz

Staff member
Joined
Aug 8, 2004
Messages
7,877
Location
KC, Missouri
Quote:
I am using the stock location because my WB has a narrow band output. Wired that into my ECU and she runs like a top.

However, my downpipe has a bung in it, plugged of course. It is in the middle of the 90 bend going back.

Here is the most important thing.

You must have the O2 sensor located so that it is not straight "level" or upward pointing. It allows moisture to collect into the sensor when off and it kills it quick. It must have a downward pitch so that the sensor screen can drain.

From what I have read, it must be close enough to stay hot. It needs temps of around 750-800 deg to work correctly and the internal heater is not good enough to do the job completely. I would try and keep it within 1 liner foot of the O2 housing if you are not going to use the stock location.

Good luck.



You shouldn't put it anywhere between 3 and 9 oclock on the down side. Also, putting it in a bend isn't a good position.
 

jepherz

Staff member
Joined
Aug 8, 2004
Messages
7,877
Location
KC, Missouri
Quote:

From what I have read, it must be close enough to stay hot. It needs temps of around 750-800 deg to work correctly and the internal heater is not good enough to do the job completely. I would try and keep it within 1 liner foot of the O2 housing if you are not going to use the stock location.

Good luck.



The heater in the wideband itself is enough to keep it at the perfect reading temperature. Otherwise people would have never been clipping them on their tailpipes.
 

Polish

Well-known member
Joined
Jan 10, 2005
Messages
8,936
Location
NE, IN
Mine is in the same spot at Stealthtt24.
 

Terry Posten

Well-known member
Joined
Dec 16, 2003
Messages
9,009
Location
Davenport, Iowa USA
My down pipe came loose (really loose) and my WB would go completely lean as soon as I let off the gas. The only thing I could think of for the reason that it was doing that was it was getting cold.

As soon as my dp was back on, everything was good.
 

Polish

Well-known member
Joined
Jan 10, 2005
Messages
8,936
Location
NE, IN
If it was loose at the O2 housing flange it's because when you let off the opening between the DP and the O2 housing will suck in air. The velocity of the air passing the gap will cause a vacuum, under boost it likely won't happen because there is so much pressure in the system. However even with no leaks mine will often go to full lean when I let off the throttle anyway because the ECU isn't injecting any fuel on coast down at times.
 
Last edited:
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