hi everyone. i bought my ford escort turbo diesel at the start of the month and found a problem. when the car is idling and the engine is warm, the engine starts to be very lumpy and runs rich with puffs of blue smoke coming out of the tail pipe. i have been told by many people that it could be the turbo seals but no 1 has actuly seen it do that. what else could it be and if it is the turbo seals then what do i have to do?

thanks ollie