I have a HKS FCD but i haven't fitted it yet, it's cutting for a reason as a saftey device so there is obviously something wrong. You would rather have it cutting than blowing up . The HKS ones can be dangerous but if you use them sensibly then im sure you will be fine. Dub Se7en has one on his and hasn't had a problem with it. The reason it is hitting it so fast is due to the spring in the standard actuator being considerably weaker. The spring in the HKS actuator is much stronger. Get a standard one and a HKS one and pull on them and you will see what i mean. You can also solve the fuel cut with an electronic boost controller i think. Im sure Sicaln has one with a standard actuator. The HKS actuator solved the problem for me anyway and since we have identical engines it wil probably do the same. I even had the same fuel cutting problem as you for about two weeks until i got an actuator. It was as soon as the engine tickled boost it felt like hitting a wall. Let me know what happens bud. Bourkey