Sensors were all fine, i only replaced the top moun ones, b2s1 and b4s1.
The rear o2 will always throw cat efficiency codes since i dont have cats in the favtory location anymore. I know a tune will take care of this as they just code them out, and ecu thinks everything is dandy.
The bucking is very very minor, i will log some data over the weekend. But the tach shows small jumps of 25 rpm or so, just small tiny fluctuations that 9/10 people would just assume its road irregularities if they felt it at all.
It pccurs in a sinusoidal like fasion, every 2 seconds or so, “hunting” would probably be the better term.