my mates having problems with his car. said its well down on power and when he revs it theres a rattle from around 1500 rpm to 3500 rpm then it stops. no smoke, cream, oil leaks from the engine. its covered 80k
it chugs now and again and sounds like its sucking in loads of air too
we had the rocker cover off to change the gasket on the weekend and everything looks fine in the top. one of the spark plugs wasnt too clever so that was changed which helped the chuggin a little.