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The plug colour might help you decide if there's too much fuel (black) or too little (pale or straw), but a misfire might also make them dirty. Unleaded fuel seems to leave some black residue at the very end, but too much black could indicate it's over-rich. Dave. UK VW Type 3 & 4 Club http://www.hallvw.clara.co.uk/ ------ ------------------------------------------------ To unsubscribe, E-mail to: <type3-off@vwtype3.org> For more help, see http://vwtype3.org/list/