Idle and boost issue 1994 e85 turbo miata
 

I drive a 1994 boosted e85 miata with a pnp megasquirt ecu and just recently the car has had an unusual idle and will stall out if I don’t give the car any throttle. The car will also stutter when I hit full boost(12psi) in any gear but till I hit full boost it will climb rpm like usual. For example I’m in 2nd gear at about 20mph with my air fuel gauge at 15.0 if I roll into the throttle it will be fine until I hit around 5k rpm at full boost and the air fuel gauge with shoot right to 22.5. Im just very confused the car driving fine anywhere away from full boost and away from full throttle but it’s no fun. Can anyone please help.