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err yes ive just had the same problem with a 2000 1.4 16v.

Mine had a new ecu, new coils, new CAT, new plugs etc.

I took it to a local specialist who did all the normal tests.....he then suspected a dodgy injector.....all were removed and serviced.......runs like a dream now :o)

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Q: 1999 Renault Scenic is rough at idling but OK when above idle speed. Plugs and coils have been garage checked and are OK. Any suggestions?
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