I was hoping someone could give me some input. I installed an AEM wideband A/F meter this weekend and it constantly sweeps back and forth so much you can barely read it. At idle it moves between 14.5 and 15.0. At 65 MPH cruise it moves between 14.0 and 15.0. Again, moving very quickly back and forth. Is this normal? I would assume it should be more consistant and smooth. Is it possible I have an air leak around the bung that the muffler shop welded in? Any help is appreciated.

 

I have the same wideband. At idle it's pretty much nailed at 14.6 and does not move much at all. I think looking for leaks is a good idea!