Land Rover Repair: Disco 2 TD5 2002, accelleration, foot to the floor

Question
Hi I have a new light version 2002 52 UK plate Dicso TD5 ES, at 3,000 rpm it starts to get irratic with the revvs, if you hold the accellerator steady the revs go up and down and the ride is jerky, also sometimes happens at the top end of accelleration, It has had a new Turbo coutessey of the dealer but nothing changed. It only happens on steady accelleration, if in sport with foot to the floor it flies straight up through 3,000 revs no problem. Any Ideas. Thanks

Answer
Oh, It's typical problem. The little tube between the turbo charger's tube and the turbo stop solenoid, is broken.
So, the turbo boost pressure is go over 2.5 bar (normal is about 1.6bar) because the turbo bypass valve don't get control pressure). So, the pressure gets over 2.5 bar, and then the engine management cuts the fuel, to spare the engine from the overpressure. When the turbo boost is lowered, it gives back the fuel, and that process will happen again...