Thread: Rough then smooth as

Can anyone give me a clue as to how my 3.5 v8 carbie engine can run smooth as the day it was born one minute and then sound like its running on 4 or 5 cylinders the next, engine is factory standard, has electronic points module thing that i have changed, new plugs, new leads, fresh fuel,praying, witchcraft etc,any clues what to do next greatly appreciated. Does the same whether engine hot or cold thanks

If you have no luck sorting the problem, you could try Gareth 0415153887.
He is a Jaguar Land Rover mechanic located at Lachlan. He overhauled the carbys and sorted the rough running on my County.