Question about 1997 BMW Z3 Roadster

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BMW 523 misfiring The car does 170 miles motorway drive in 1 day, twice a week. if at anytime caught in traffic for anylength of time engine fires on 5 cylinders, there is only slight change in engine temperature and thermostat kicks in,but may misfire for upto further 20 miles before clearing. when driving at home, can drive to corner shop, get back in car and get caught at traffic lights. engine misfires again. Have on many occasions drove 170miles daily and not suffered any problems, but caught in traffic for 5 mins and misfire will occur any suggestions please.

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More then likely you need to change the spark plugs because they are fouling out. Thats the cheapest fix that I would do first! Then check coils.

Posted on Mar 14, 2011

  • adrian page Mar 15, 2011

    SPARK PLUGS AND COIL PACKS CHANGED problem still continues, no different

  • gonshik007 Mar 15, 2011

    Try using seafoam to clean out the possible carbon build up in the engine.

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