98 A4 1.9Tdi - smoke,soot & intermittent turbo

[Phil247]

98 A4 1.9Tdi - smoke,soot & intermittent turbo
Hoping someone can help?

My Audi A4 Avante with 150k miles on the clock has started smoking badly. A cloud of smoke is typical on start up which then disippates but then when accelerating hard and as it reaches the higher revs the smoke returns or even driving it at a constant speed in the higher revs e.g 4k rpm its there too. Releasing the throttle to cruise rather than push reduces the smoke.

If I rev the engine hard whilst stationary there is a cloud of what I would describe as grey/black smoke but also a large black stain immediately below the exhaust outlet which seems sooty and dry rather than damp?

Whilst driving the turbo occasionally stops working i.e the engine doesnt seem to want to accelerate. If however I turn the engine off whilst still rolling and then restart it the turbo is back again (all be it with an initial cloud of smoke).

It passed its MOT 3 months ago whilst suffering from just a smoke problem and the mot tester simply put it down to its age and mileage (without actually looking at even the symptoms himself). I then spoke to the owner who from my description of the smoke alone seemed adamant that the turbo had failed? I trust him as he has owned and maintained performance cars in his past but there seem to be so many comments on-line of msitakes being made in the diagnosis of turbo trouble that I thought I'd try hear? Thanks for patience in reading this message. Help! Phil247

[REMO]

Hi, Phil Got Same Car But Saloon,for The Smoking Have You Tryed Millers Diesel Treatment ?