missing when letting off a hard throttle ??

[apracing]

ive been having problem with code 33,34,35 ,its be a bad time ....im on my third ecu cause off code 34 ,i just put good coils in all three hole ,oem. but now when i ripe the throttle hard ,when i let off it sometimes brings up one off the three codes ,running cr10ek plugs ,thinking there to cold and cr9ek would be better ??cause the sled it stock or any idea what to try to stop these codes or making the problem ??