Dunno if this helps, but I had a similar problem with a '90 turbo. Turned out that the front catalytic converter (the one that hooks straight up to the elbow from the turbo) was shattered inside, so was preventing a good exhaust flow. Removing the contents of the cat pretty much solved the problem. Also, any exhaust or inlet hose leaks will likely affect boost very badly. Could be worth a look anyway? With no boost, the car will just crawl. It gotta have that boost to be anything like usable.
As for timing, not sure I understand your question? I think the ECU will report timing that is _way_ out of whack, but you can certainly time it up by setting the ECU in diagnostic mode (can't remember the pins to do this, but there must be posts on this - it's the same as for reading the ECU error codes).
Tony
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