When tuning, can you take out the narrowband O2 and use the wideband only? I was just wondering if there was a way to get around welding in another bung on the downpipe that will only be used when I get the car tuned.

 

You only need the wideband, take the other one out and use the wide band o2 sensor only.

 

but, will not having the narrowband mess up the ecu? it's a power fc.