Hey - thanks for looking,

I have a 1986 S2 that I bought here in Australia, its had an EFi conversion, runs on adaptronic management and I had it set up at EFi performance dyno about 2 weeks ago. Before it went for its dyno tune it had a problem that I could only describe as a 'misfire' - when you tried to drive it it would just stall - it also sounds like its backfiring through the inlet side of things ( I could be mistaken but thats what it sounds like ). I got it back from the dyno and it drove brilliantly, pulled really well through the gears and the 'misfiring' was gone. Now here we are a little over a week after it was tuned and its worse than ever! It will start and sit and tick over without too much drama, but if you try and rev the engine or drive it, it just pops and bangs and conks out! Now I dont know too much about these cars other than I love them and I believe mine is one of only 2 S2s out here in Oz, needless to say there isnt a whole heap of knowledge about them anywhere here - can anybody point me in the right direction in getting it running? I have some limited spares (dizzy cap, rotor arms etc.). Any help or suggestions would be really gratefully received.

Craig.