what kind of A/F do our cars like on decel in high vacuum? ive tried lean and rich and i cant seem to keep the car from bucking?

 

i run decel fuel-cut until 1700 rpms, below that its about 14.5.

 

fuel cut was enabled but i disabled it so that i can get it to quit bucking after the fuel cut stops.
Ive tried anywhere from 15:0 to 12:0 and i cant find a happy spot. maybe since i haven't had a manual tranny in so long im not used to it and its the tranny??

 

My car bucks too, but only in 1st, maybe 2nd gear. I figured it was just from the manual transmission and a low torque engine.