Hi, everyone. Sorry for my poor english. I have a Golf MK4 AXR PD100. My stock turbo was KKK KP39. Turbo blown out. I changed the turbo GT1749VA hybrit. Turbo has 52 mm intake pal. I update the software.Set the 1.8 bar. No boost coming. I set the actuator. Boost come but third, fourth and fifth gear 2k rpm my car go to limp mode. 2.5k rpm and upper rpms there is no problem. Checked N75, checked actuator, checked all vacuum lines for leaks. KKK KP39's actuator and GT1749VA actuator can it be different strength? These actuators length is different. Thx for the answers.