I have been recording large amounts of data using datamaster(approx. 30000 per drive) and was noticing that my blm on the right bank is always lower than my left. Ex: 127 left 119 right These numbers are after I average all the data for that drive. I have been changing my lower ve table and have had sucess but this trend seems to always be this way. I have averaged all my O2 reading but they seem to be fairly close. Ex: 555 left 552 right So far I have installed new O2 sensors and swapped injectors from left to right but the result is the same. I am running headers but the O2 bung is in the same location on both sides. I am running a 93 speed denisity ecm with stock cam and heads. The engine is a 93 lt1 in a 88 GTA. The only mods are headers, K&N open element, TPIS air foil, and TPIS afpr. I feel that with this condition I will never get to exactely 128/128. Is this something I should be concerned about? Thanks

A difference of 8 seems like a lot to me but I don't have any experience with the 93 LT1's. Have you tried just swapping the left o2 sensor for the right?
These aren't heated sensors are they?

Yes, I have swapped the sensors and it is still the same readiing.
The sensors are not heated.
I still have my ccp on this engine. I am going to remove and plug the port. This line is on the right side of the engine but I would figure that the fuel vapor from the tank would be distributed equally in the intake. I am going to try it this weekend and see if it makes a difference.

Thanks