dont know how much more i can take!!!

i have an rs turbo series 2. whilst driving the car cut out and rolled to a stop and wouldnt fire up. i changed the feul relay as advised but it kept cutting out in mid drive also blowbacking. i changed the distributer body and ignition coil as advised again, now i tick over too fast blow black smoke for a while and when i drive and then turn the engine off it wont fire back up for 10 minutes, like the battery is flat.
had the starter motor rewired but the car still plays up.
im lost, need the car tuned but i cant risk driving at the moment, and have had to be towed 6 times in 20 days!!! not good