Thread: cosworth black smoke running rich? backfires when revved hard thick black sooty plugs
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Old Sep 11, 2015 | 04:47 PM
  #21  
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stevenr
Too many posts.. I need a life!!
 
Joined: Dec 2007
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From: Inverness
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Mine turned out to be a dodgy plug,new set fitted the other night and normal service has resumed
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