turbo going?,, again!

Hi chaps, think I'm a bit unlucky, as I think my new ish (second hand) turbo is on its way out after just a few months use..



Symptoms are:

Sudden losses of power at 3000rpm or above (this is intermittent, but is getting worse), in higher gears. Clouds of black smoke out the exhaust when power loss occurs.

Boost gauge all over the place when getting the power loss, uneven power delivery..

No boost leaks.



Since fitting the turbo, this has always happened, but only at high revvs in 5th at around 110mph (on track of course!). And this never happened on the old turbo, so I was a bit wary of this from the start, but i guess its slowly gotten worse over time and now happens at lower and lower pressure/Rpms..



Just thought I'd check on here in case anyone has any other ideas of what could possibly cause these symptoms?



Thanks again guys..

James.

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