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Rear O2 Sensor's

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Old Jan 18, 2006 | 05:09 PM
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Default Rear O2 Sensor's

(REAR O2"S)Does the drivers side go to drivers side or do they cross over.I can't remember when I took them out.
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Old Jan 18, 2006 | 05:13 PM
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The rear ones cross over.

Front ones connect to the side they are on.
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Old Jan 18, 2006 | 05:34 PM
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Nope they dont. Left goes to left and right goes to right
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Old Jan 18, 2006 | 06:23 PM
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Mine stayed on the same side that the wire came down from.
Left is left and right is right!
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Old Jan 18, 2006 | 06:57 PM
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the rears cross over. the left sensor plugs into the right side and the right rear plugs into the left side
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Old Jan 18, 2006 | 07:05 PM
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Originally Posted by dpd
the rears cross over. the left sensor plugs into the right side and the right rear plugs into the left side

No way
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Old Jan 18, 2006 | 07:12 PM
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Originally Posted by IT L GO
No way

no the left REAR plugs into the harness on the RIGHT side and vise-verse.
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Old Jan 18, 2006 | 07:31 PM
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Holy cr*p which one is it!!!!!!!
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Old Jan 18, 2006 | 07:35 PM
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Originally Posted by dpd
no the left REAR plugs into the harness on the RIGHT side and vise-verse.
The rear O2 sensors cross over if you are using your stock exhaust. If you have long tube headers, well, that's a different story.
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Old Jan 18, 2006 | 07:36 PM
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Originally Posted by DRIVER456
Holy cr*p which one is it!!!!!!!
I guess you are gonna have to go with the senior members
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Old Jan 18, 2006 | 07:37 PM
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Originally Posted by 1SGRET
The rear O2 sensors cross over if you are using your stock exhaust. If you have long tube headers, well, that's a different story.
I just installed LG street series headers w/high flow cats.
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Old Jan 18, 2006 | 07:41 PM
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Originally Posted by DRIVER456
I just installed LG street series headers w/high flow cats.
I also have LG's and they do not cross. When I got my car tuned he wanted to make sure that we DID NOT cross them because he said it would run like crap!
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Old Jan 18, 2006 | 07:54 PM
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The REAR (post-cat) sensor wires cross.

The fronts do not.

If you have LG headers, you only have provisions for the front (pre-cat) sensors, and although you physically use the original rear sensors, realize they are now taking on the role of the front sensors, and you do not cross those.

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Old Jan 18, 2006 | 07:54 PM
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Originally Posted by DRIVER456
I just installed LG street series headers w/high flow cats.

you DIDN'T say you put HEADERS on it!!!! if you are running lg's with 4 sensors[2 front, 2 rear],you hook it back up JUST LIKE STOCK[rears cross].the SENSORS in the COLLECTORS go LEFT to LEFT,RIGHT to RIGHT,the SENSORS in the X-PIPE cross LEFT to RIGHT,RIGHT to LEFT
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Old Jan 18, 2006 | 07:57 PM
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Old Jan 18, 2006 | 08:04 PM
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Originally Posted by dpd
you DIDN'T say you put HEADERS on it!!!! if you are running lg's with 4 sensors[2 front, 2 rear],you hook it back up JUST LIKE STOCK[rears cross].the SENSORS in the COLLECTORS go LEFT to LEFT,RIGHT to RIGHT,the SENSORS in the X-PIPE cross LEFT to RIGHT,RIGHT to LEFT
OK whats the difference if you have headers or not,All I ask if the Rear O2 sensors cross or not.I'm running all 4 sensors.
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Old Jan 18, 2006 | 08:08 PM
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Here's the rear sensors on a stock exhaust.



Although not on the car, you can easily see how and where the wires cross where they meet the sensors, due to the size contraints of the tunnel, it's really the only possible way to run these wires without them touching the pipes.

If your LG system uses 4 sensors....the wiring for the front 2 do NOT cross, but the rear ones do, and the orientation of the sensors, and the wiring should look like the above.

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Old Jan 18, 2006 | 08:26 PM
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Originally Posted by Y2Kvert4me
Here's the rear sensors on a stock exhaust.



Although not on the car, you can easily see how and where the wires cross where they meet the sensors, due to the size contraints of the tunnel, it's really the only possible way to run these wires without them touching the pipes.

If your LG system uses 4 sensors....the wiring for the front 2 do NOT cross, but the rear ones do, and the orientation of the sensors, and the wiring should look like the above.

I know the front is right to right ect. ect. So what your saying is the right O2 sensor going to the rear of the car that is plugged in at the right side of of the car(passenger side) which is about right below the fire wall goes to the left side(drivers side) rear O2 bung.Yes or no is all I want to know did that make sense
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Old Jan 18, 2006 | 08:29 PM
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Looking at that picture the wire on the left side would plug into the passenger side plug?
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Old Jan 18, 2006 | 08:30 PM
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I'm saying the wire of the rear sensor physically screwed into the left pipe runs up along the right side of the tunnel, and connects on the right side of the engine.

The wires for the sensor physically screwed into the right pipe euns up the left side of the tunnel, and connects to the harness on the left side of the engine.

Just like in the pic above.

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