TEST DRIVE O2DTC REMOVED 20200326.hpl
New to tuning. I logged (attached) a little bit after turning p0133 and p0153 O2 switching codes off, after replacing leaking exhaust manifold with speed engineering shorty headers. I saw what looked to me to be some erratic and some aggressive timing changes. It doesn't seem normal to me, so I figured I'd ask here to see what y'all thought.
Forgot to add what it is. 2008 Yukon denali 6.2 L92 all stock except for shorty headers and plug wires. It does not have DOD.