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  1. Focus RS Maintenance
    So I finally did my spark plugs. Replaced the stocks with SP-550, and all new gaps are roughly 0.028" - I just picked four out of the eight I ordered that had the most consistent gap. Torqued it all to 13Nm, because 12Nm seemed low! ;) Also, whoever torqued them last must have hard arms of a...
    oil spark plugs
  2. Focus RS TroubleShooting
    Ask your tuner about spark plug gap. .026 is a good start for most people, some have gone with a smaller gap and someone had a better experience with larger gap. Where did you buy your plugs? There are lots of fakes on Amazon and eBay.
    gapped ignition corrections knock spark plugs tune
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