Question about 2004 Renault Sportwagon

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Renault megane diesel black smoke

Car was running fine until it stopped as soon as I got out of the motorway. I had trouble starting it and finally managed to start it and get it to a garage. It is giving lot of rattling noise from the engine and black smoke from the exhaust.
There was a slight loss of power before all this happened.

Now the car is having troubles starting also. Please suggest. One of the mechanic says its bad diesel, other says its cam belt or fuel pump.

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  • aarvee Dec 31, 2008

    The model is renault megane 1.9dti (2002)

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This could be as simple as the EGR (exhaust gas recycling) valve stuck open. This valve is supposed to open at a specific time, recycling the exhaust gasses back through the engine. If they stick open, the engine is not getting the correct air mixture to burn the fuel efficently, causing black smoke and lack of power. Have the garage remove and blank off this valve. If it runs ok, then a new EGR is needed.

TL

Posted on Jan 24, 2009

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Posted on Jan 02, 2017

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