I have a SC400 JDM Aristo 2jzgte powered with a autobox ecu. I fitted it with a Greddy boost cut defender. I have tried capping voltages of 4.3, 4.1, 3.96 and I still get boost/fuel cut. I'm afraid of trying any lower. It is my understanding that boost cut should be when the TPS sensor voltage is > 4.3. I checked the BCC on the bench and it operates properly. Any help would be greatly appreciated....