try datalogging this way. forget about closed loop for now.

log afr, timing, rpm, engine load. from 2000 rpm in 3rd gear stand on the throttle and take it to redline , watching afr. if your not spiking this will allow the obdII to capture the data as fast as possible . remember rpm may not line up with timing etc due to sample rates. this is how you correctly log. the slow rpm start allows you to watch afr and back out if it goes big lean

if you want to log other parameters let it cool down and keep the samples to 4 or less parameters