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Old 02-22-2014, 07:03 PM   #1
LouBomb
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Question for Tom or any with input

So Im finally installing the AEM wideband you told my brother to install when you did his tuning at focus power, and when I go to look to install the sensor for the wideband. I notice there are three o2 sensors plugged in.

One is in the exhaust manifold, one is in the down pipe, and one is just installed without being plugged in to anything about 2-3 inches further down. it was just ziptied together.

Im confused as to why is there one in the exhaust manifold, and one on the downpipe.. Which one is the active one? or are they both active? and can i take the one out of the downpipe and replace it with the sensor for the aem?


i took pics im waiting for my buddy to send em to me. then ill post up..

im just confused lol and this is one of the steps that i need to do to finalize the tuning..


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Old 02-22-2014, 07:38 PM   #2
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this is the 02 sensor that is plugged in to the manifold



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Old 02-22-2014, 07:41 PM   #3
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this is the down pipe... in the exposed hole there was a 02 sensor that was also plugged in to something..

and the one next to it.. was just in but not plugged in to anything..

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Old 02-22-2014, 08:10 PM   #4
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I had always thought the greenish one was the after cat 02 no idea why it would be that high up... Mine dangles freely and is eliminated with tune... But i could be wrong
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Old 02-23-2014, 12:58 AM   #5
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The green one is the second o2. It's not needed
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Old 02-23-2014, 12:59 AM   #6
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Woo i was right =]
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Old 02-23-2014, 12:59 AM   #7
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But why it would be plugged into ur mani idk if it isnt turned off it could be messing with ur tune
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Old 02-23-2014, 11:07 AM   #8
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that is my thought.. why is it plugged in?

and into the mani?

can i unplugged that other 02? and put my wideband sensor in there?

this is confusing..
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Old 02-23-2014, 11:08 AM   #9
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Is the 3rd o2 being used and how far back is it?
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Old 02-23-2014, 11:12 AM   #10
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Even thou mines not used it's still plugged in. Doesn't effect anything being there.
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