to be able to answer your question i would need to know the computer parameters for the timing.it may have something to do with the lack of backpressure in the exhaust and /or the new chip that you put in the computer.why dont you swap the chips back and run your test again at idle.the chip may be your problem because the live data should only be showing bank 1 and 2 not 3 and 4.this suggests that something with either your code reader or the chip is not right.

__________________
David S Poole
European Performance
Dallas, TX
4696880422

"Fortune favors the prepared mind"
1987 Mercedes Benz 420SEL
1988 Mercedes Benz 300TE (With new evaporator)
2000 Mercedes Benz C280
http://www.w108.org/gallery/albums/A...1159.thumb.jpg