Hi, I have a land rover defender 2010, with 30000 km. Problem is when the car is cool or just started it runs fine. When you accelerate it for say 15 to 20 min or more precisely when the turbo is active, the engine slows down, which means the car will not accelerate, the turbo won't work and the car won't go beyond 60 km an hour. However when turbo is working it runs just great. I have noticed that if u accelerate it gently it will run fine for a long time. Problem happens only when turbo is rapidly engaged. Also once the problem starts if you stop the car for 5 to ten minutes is becomes normal again. What could this be? Anyone else experience this?