B20V vtec crossover weird stutter

[killanoa]

hi guys,

I have a b20v tuned awhile back. lately when it crosses over to vtec it sounds like its choking even after i let off the gas pedal, but then goes away after i slow down. datalog AFR seems to be jagged. could this be my injectors? fueling issue or something else? thanks in advance.

[Spunkster]

It's hard to tell just from the datalog. I would recommend that you have your tuner take a look at it and see what might be going on.