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Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

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Old 05-20-2013, 05:35 PM   #1
dbarton62
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Join Date: Apr 2013
Location: Kitchener Ont Canada
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My Ride: 04Z4R VF Supercharge
AFR sensor installation

I am having trouble determining where I should be tapping in a sensor for an Air Fuel Ratio gauge.

I have read that #6 cylinder runs richest but I have also read that #6 runs leanest.
I understand that you want to get the signal from the leanest cylinder.

My questions are
1)can you remove one of the factory O2 sensors per-cat and screw in the wide band sensor or do you need to install a new bung?
2)if I need to weld in a new bung where should it go?

I have stock manifolds.

Thanks
Dave
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Old 05-20-2013, 06:14 PM   #2
SK330ci
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Weld in new bung, Refer to picture for bung hole location.


I had to, I had to say Bung Hole.


Anyway, that's where I'd put.
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Old 05-20-2013, 06:29 PM   #3
dbarton62
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Love Bevis and Butthead.

Thanks for the reply, would prefer not to remove the manifolds but if it's the only way so be it

Thanks
Dave
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Old 05-20-2013, 06:57 PM   #4
SK330ci
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Quote:
Originally Posted by dbarton62 View Post
Love Bevis and Butthead.

Thanks for the reply, would prefer not to remove the manifolds but if it's the only way so be it

Thanks
Dave
Let this play out for another day or so and get a few more opinions, they're many smart people on this forum. But that's the way I'd do it.

PS, remember to disconnect the battery before you weld anything; your ECU with thank you upon start up.
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Last edited by SK330ci; 05-20-2013 at 06:59 PM.
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Old 05-20-2013, 07:28 PM   #5
dbarton62
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No worries will do.
Good to be informed
Thanks
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Old 05-22-2013, 03:39 PM   #6
dbarton62
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Anyone else have any insight into this?
Can,t believe with all the FI E46 out there, there isn,t anyone who has installed an AFR gauge and sensor.

Dave
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