on starting 1.5dci. car runs very lumpy, car will not rev

2003 RENAULT MEGANE
80,000 MILES
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LES.FLETCHER
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after ticking over for 3 to 4 mins, car will rev but is still lumpy at tick over.. there is a lot of top end rattle.and fumes and smoke..
Apr 19, 2012 at 5:15 PM
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RASMATAZ
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-Sounds like a valve lifters leakdown and valve seal problem-
Apr 19, 2012 at 5:18 PM
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LES.FLETCHER
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valve lifter are you talking camshaft.valve seals and what is a leakdown
Apr 19, 2012 at 6:12 PM
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RASMATAZ
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Replace the valve lifters its leaking
Apr 21, 2012 at 9:45 PM