Attached is a log of a stockish 99 SS 6 speed car. The car has a flowmaster, no EGR/AIR/throttlebody bypass, no rear O2's/ TR6's/ K and N air filter. The previous owner removed the driver side CAT. I removed torque reduction, traction control, lowered fan temps, removed skip-shift, basic stufff. By the looks of the logs and the way the car feels, it just feels like its being restricted or held back. The MAF lb/min also seems low for the car. Once he gets headers and replaces the flowmaster I will do a MAF tune on it, but just looking for ideas on other stuff to check. I almost don't trust the front O2's when he went WOT since it looks like it goes lean, but shows no knock and hes running 26 degrees of timing. Ideas of things to check are welcome.
12-14-13.efi