AppleJack Posted June 3, 2005 Share Posted June 3, 2005 Has anyone noticed any light engine knock (pinging) on their 92 SC400? I use the hi grade fuel and under light acceleration - mainly at higher speeds I can hear the onset of this condition. Let me know what you did to fix it. thanks. Quote Link to comment Share on other sites More sharing options...
JDOwen2 Posted June 3, 2005 Share Posted June 3, 2005 When was the last time a tune-up was done? Quote Link to comment Share on other sites More sharing options...
AppleJack Posted June 3, 2005 Author Share Posted June 3, 2005 about 4 or 5 years ago - but I replaced the spark plugs and wires ... (maybe it's time to revist the dealer to have it checked out - although I don't trust them a whole lot ...) Quote Link to comment Share on other sites More sharing options...
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