I had a strange behaviour today on my log. After a test pull to tune the 100kpa Cells lambda was around 0.84 -0.9 even with fuel cut ON. Also knock sensor registered some spikes. (also at the end of the pull) Then my EGT went crazy to 1100 and was unstable during overrun. (still full fuel cut!)
What just happened? Unburnt fuel due to 0.8 - 0.77 lambda and knocking at the end of the run then drop to 13deg ignition = whole combustion go to the manifold and rise egt crazy? feel so stupid after seeing this log 
faulty injector ? gives some amount of fuel even with fuel cut?
also there is 0,03ms PW when fuelcut - is it okay?
Is it just after fire due to 0,77 lambda a moment before closing throttle.
edit: MAP spike was due to my stupid DBW characteristic to keep no boost - edited just 100% PPS cell for 25% TPS so MAP spike is not a mystery for now. Just lambda, egt and knock sensor reading.
