Ford Focus>> Ignition system>> Spark plugs>> The gap between electrodes increases in operation
Along with the correct kalilny number (see tab. «Candles for Ford Focus car engines») spark plugs should have a demanded gap between electrodes for each candle. It makes for new candles about 1,3 mm, but increases in process of operation.
At replacement of candles pay attention to that on your car candles with the ordered kalilny number demanded by a gap and the corresponding carving were established only.