You can be driving along at any speed then all of a sudden the engine cuts out, I try to bump it back into life whilst moving but it doesn't work. Occasionally it will come back to life whilst bumping it on the move, sometimes it dies, spluters once then starts itself a bit like a misfire but not sure? Everytime it cuts out though its smooth so that your not aware its gone until you have no power. Plus it wont restart again until the ignition has been turned completely off.

One thing i have found strange is that the turbo still seems to spool, like i'm hearing the noise but no power? I've probably missed loads but any ideas before i start buying things i don't need? Oh the car is a 1991 H Sapphire 4x4. Thanks.