Quote Originally Posted by swingtan View Post
I'v e been looking at dynamics a bit more and found another interesting point.

When running CL, if you get a large rich spike on throttle close, the O2's will pull a massive amount of fuel to bring the AFR's back to where they should be. If you then snap the throttle open again, you get a huge lean spike, as the O2's have pulled all the fuel out.
What sort of time frame/load? Any logs of the lean/rich spikes? Have found similar quick throttle opens under no load to give a rich blip followed immediately by a lean blip then of course back to L=1.