Other than that, its either, Port the wastegate (but i guarantee its cracked) FCD & RRFPR setup Some sort of ECU, P&P or EMB etc. External wastegate setup to help control boost Larger turbo setup Dont go full throttle in 1st, 2nd, 3rd... Even with a HKS actuator or a boost controller set to low boost it'll still creep into fuel cut, its just what happens on CT9s.