Mike K.

This just recently started happening to me, I run c16 leaded in my alt fuel cell and 93 in the regular tank, on reg gas a/f according to my narrowband 02's is normal as it has always been, but when I spray now the o2's fluctuate kinda like it does when you are normally driving around but it bounces from rich to lean just a little slower than it does when regularly driving.

This problem recently developed, my a/f has checked out on a dyno and my 02's used to not bounce like this on the no2, you guys think this is a sign of my 02's going bad? I also don't get any detonation and the car still feels just as fast i.e no surging etc.

what do you guys think?