My renault is shuddering and juddering and lacking power. Anybody got any ideas what it is

Asked by Jul 13, 2012 at 11:32 AM about the 2002 Renault Megane

Question type: Maintenance & Repair

My Renault Megane is shuddering and juddering when idle.  It is also lacking power,  engine management light is flashing.  Anybody had the same problems

4 Answers


You might want to go out and look around the engine for vacuum leaks, that would be the most likely cause.

3 of 3 people found this helpful.

Most common cause of rough running Renaults is a faulty ignition coil/s. Theses are found on most of the 16 valve engines and are the 'pencil' type coil. As your engine management light has illuminated there SHOULD be a stored fault in the ECU memory, most garages will have equipment to read the fault codes, however I have had Renaults that although the engine is clearly mis-firing the diagnostic tool has given the ECU a clear bill of health. Most motor factors will stock the coils so you do not need to pay extortionate main dealer prices.

1 of 1 people found this helpful.

Thank you for help. It was the ignition coil. Now running like a dream .

My megane is shudderin and flashin engine ligh. Was fine the other day. I put petrol in an its not been the same

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