passat turbo troubles
 

hi all just wondering if anyone could help. I have a passat x reg 2001 tdi 130hp engine. I have been having issues with the turbo, it works when i first start the car though not to full strength but after about 5miles or so when travelling at 70-80mph consintantly the turbo does not kick in at all. However if i turn the car off and back on then the turbo will work again until it goes off again. We have checked all hoses and connections for splits and so on and have had no joy so just wondering if anyone else has any ideas. cheers