I've been reading all these posts about this rythmic "hesitaion" while the turbo is kicked in because I have just aquired a 1985 turbo wagon and it does the same thing (it is very irritating). I have had no time whatsoever to go after it, but I was under the impression that it was the result of the waste gate oppening and closeing. What do you think? I've been planning on persuing this line of thought by monitoring manifold pressure at waste gate hose connection.