biggles

I would appreciate some feedback on solving what I think might be an issue of blow back. I recently changed out my piggyback and chips and went to a mafterburner and Max chips, however, I have a major issue with stalling after releasing the throttle at a stop. Previously used a SAFCII which allowed for adjustment of the decelerating air, plus the GURU chip was not as rich as this chip. Can this problem be solved with the mafterburner as I will be doing some tuning during the week?

Thanks!
Biggles