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misfire on tickover?

have a misfire on a vectra 1.8 y plate, have done a preasure vac test on cylinders 1 12bar 2 6bar 3 6bar 4 12bar.
PAUL, September 2010
Those compression figures would tend to indicate a head gasket/cracked head problem, between # 2&3 cylinders, as the compression should be 12~15 bar and you only have 6 bar on those cylinders

nigel, September 2010
you mean misfire or just the engine or just the engine rev gos low then picks up if so then you need to check your flow meter mate. and if is really misfiring then good new spark plugs should solve the problem hope it helps.

raul, September 2010
link Click here to see other fixes for Vauxhall Vectra 1.8.