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Gosh I'm posting too much....what does one BLACK spark plug mean? 200 1986

posted by  unggthat on  Fri Oct 24 08:08 CST 2003
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last visit: Thu Mar 6 10:37 CST 2014
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So my car, which is running incredibly poorly, has this problem: spark plugs for cylinders 2, 3, and 4 are all a nice light brown color, just what you'd expect. However, cylinder 1's plug is a dark black color, meaning rich mixture in that cylinder. this could be the cause of my serious engine issues, so my question is: what causes this in only one cylinder? bad injector putting too much gas through? as usual, any help is greatly appreciated!
Nate Gundy
--
'86 240DL, M46, K cam, 25/21mm sways






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