hi again, little update
itook it this morn to be checked and they assure me its timed correctly, and ignition timing is ok,
so bit naffed off cos ws hoping for a quick fix, lol, and when i got in i used my cheapncheerfull vagcom lead an laptop and reset the code myself, started engine and it come on, so reset it again while running, hey presto no 5k liimit, so i drove round a bit then stopped car and engine and started, couldnt get laptop on cos it went flat but the limiter was back at 5k, so to me this kinda points to the hall sensor causing the problem, would you agree? also the dizzy cap isnt very good, its cracked round the rear fitting, so could also cause me trouble?
cheeers