Anyone know why this is? I'm working on our 03 Trailblazer I6. I have recorded with the WBO2 and the stock O2 and watched it wait until 4800 RPM to hit PE mode, even when I goto WOT from a dead stop. This appears to be causing a lean spot and KR, which you can see goes away when PE mode comes on, and the WB reports going from 14.7 to 11.5.
Before I go drop this in the table to like 2000 RPM, can anyone tell me why this is set so high from the factory? Emissions?
Thanks..
Bob