Lump tickover & smoking out of the exhaust... help?

[James H]

Sorting out the lumpy idle & smoking, was running on only 3 cyclinders but she is now starting up rough then idling high & will slowy drop to 0 revs & cut out, if I rev her up while she is running it is really rough & engine shakes loads, any ideas?

thanks James

[adzs12]

Head gasket?