picked up a Mk3 1.7 turbo diesel.
it fires up, after a hell of a lot of cranking, and ticks over ok ishh. After a while, it starts smoking (black).
It has no (and I mean NO) power until about 4000 rpm, like it barely revs. after that, its better, but no way right.
We can hear the turbo spinning, the wastegate is moving correctly.
2 suggestions - 1) pump timing out. 2) exhaust re-circ stuck open.
Oddly, when the engine was picked up, the vacuum pump was off it - which does connect to the exhaust valve thingy.