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post #18 of (permalink) Old 30th March 2011
Technical Supremo

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Re: Assorted Clio Problems

Ah-Ha - the plot thickens.

Oil in the inlet manifold will cause rich running as I first suspected and giving the engine a rev temporiarly clears some of the oil and allows a bit more air in.

The mosty common cause for such on this engine is a faluty PCV valve jammed opened. I suggest you either clean or replace it. The PCV valve lives in the crankcase breather pipe going to the air inlet plumbing. After you've sorted the PCV aspect you'll need to partialy dismantle the inlet system for a good clean out. Start at the air filter and work your way along.
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