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Old 04-01-2009, 11:49 PM   #1
snbco07
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Smile LC-1 Wideband replacing factory o2

So my question is... How would I go about wiring up the analog output(yellow wire aka narrowband output) to my factory rear o2 harness? Which plug would I use, and what happens to the other plugs on the sensor connector? I plan on putting the wideband sensor in my factory DP location, it seems the right thing to do if the LC-1 can do narrow and wideband. Thanks for any input!
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Old 04-02-2009, 12:02 AM   #2
snbco07
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Or better yet, can I leave the factory o2 disconnected altogether, turn off the CEL's and call it good with just wideband?
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Old 04-02-2009, 12:10 AM   #3
Uncle Scotty
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Or better yet, can I leave the factory o2 disconnected altogether, turn off the CEL's and call it good with just wideband?
you have to use the stock front o2

the rear can be done away with on the pre-04's
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Old 04-02-2009, 12:35 AM   #4
snbco07
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Awesome thats exactly what I was hoping. Just for the record though, if I did have an 04+ how would I go about wiring that? Or could I even? Thanks Scotty
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Old 04-02-2009, 01:51 AM   #5
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Awesome thats exactly what I was hoping. Just for the record though, if I did have an 04+ how would I go about wiring that? Or could I even? Thanks Scotty
the front o2 is used by the ecu to control the engine operating parameters and must be used....and only a subaru sensor should be used----others usually cause issues of some sort or other.

on the 02-03 the rear o2 only monitors cat function and you can do away with it and kill the code with opensource and forgetaboutit---on 04+ cars, the ecu uses the rear o2 to adjust fuel trims and getting rid of it can be problematic....but you can turn off the 'cat inefficiency' code with open source and run catless---but keep the rear o2 in place to keep the ecu happy...and just have another bung welded in for the wideband....the bung can be bought for >$10 and a competent muffler shop can install it easily
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with the progress of opensource tuning and its capabilities using any kind of mechanical or 'wired in' so called 'fix' to run catless is just plain stupid
get a cable and a laptop and kill the code and done
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Old 04-02-2009, 11:52 AM   #6
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That solves it for me, thanks!
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Old 04-02-2009, 04:43 PM   #7
steverx05
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Originally Posted by Uncle Scotty View Post
the front o2 is used by the ecu to control the engine operating parameters and must be used....and only a subaru sensor should be used----others usually cause issues of some sort or other.

on the 02-03 the rear o2 only monitors cat function and you can do away with it and kill the code with opensource and forgetaboutit---on 04+ cars, the ecu uses the rear o2 to adjust fuel trims and getting rid of it can be problematic....but you can turn off the 'cat inefficiency' code with open source and run catless---but keep the rear o2 in place to keep the ecu happy...and just have another bung welded in for the wideband....the bung can be bought for >$10 and a competent muffler shop can install it easily
____________________________

with the progress of opensource tuning and its capabilities using any kind of mechanical or 'wired in' so called 'fix' to run catless is just plain stupid
get a cable and a laptop and kill the code and done
How much is it hurting the car to run the "mechanical" fix on an 05? I went with that to make sure I would pass emissions tests but if it's causing harm then I want to take it off and clear the code some other way.
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Old 04-02-2009, 06:25 PM   #8
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How much is it hurting the car to run the "mechanical" fix on an 05? I went with that to make sure I would pass emissions tests but if it's causing harm then I want to take it off and clear the code some other way.
well....turning the code off with open source is the best solution

you would have to log your fuel trims to see what they are and what they become after you remove the mechanical fix
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