He would've seen a misfire if he is looking at his data logs. A misfire shows up as big spikes in the air fuel ratio.
This is true, but it would seem that most people that install these so called self tuning T body efi systems know very little about reading AFR data logging, NOT TO put down the OP, but the problems he is have are VERY common with ALL of these self tuners. NO OFFENSE TO 1mean340, the problem is the way these KITS are promoted as bolt on & go, that is NOT the case on most installs.
