Alfa Spider missing

I have a 1981 2000 Spider with Webers and Marelli distributor.
It has just started missing as the revs approach 5000. Everything appears in order. Can anybody help? Alfiescar

Moved to Classic Alfas Tech Lounge

Phew, thought for a minute it had been nicked.

I'm afraid I can't help other than to commiserate.

But at least you've still got it.

Timing maybe?? Wrong heat spark plugs?? Dizzy might be out??

Check the dizzy, condensor, plug leads and plugs.

I'm with Renone on this one - Excessive play in distributor shaft ? Points knackered ? HT leads up to snuff ? I'd make my way through ignition system first, satisfy myself that all was as it should be, before looking into fuel system area...