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06-03-2008, 11:59 PM
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#1 (permalink) |
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NECO Member
Join Date: Jan 2004
Location: Fort Erie, ontario
Posts: 2,237
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Oil on plug?
I was changing my plugs tonight and 5 of the 6 look fine. But the 6th cyl. Was covered in oil. When I look at the bottom of the cyl. It looks new inside where as the other 2 front ones (all I could see) were black inside.
Any idea whats going on? It looks to me that the 6th spark plug/wire isnt fireing. 
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 MICH, 99 laser red Roush cougar MTX - Msds-Injen/GMK-magnaflow-ford racing-svt-Xcal2-b&g-kyb-tezzen-clarion-earthquake |
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06-04-2008, 12:08 AM
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#2 (permalink) | |
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www.cagerattle.com
  
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Re: Oil on plug?
Quote:
That's how my engine went down, a bad piston ring on cylinder number was letting oil foul the spark plug. Do a compression test to confirm.
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CFX 1st Place Mild ------------------------------------------------------------ 
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06-04-2008, 12:10 AM
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#3 (permalink) |
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www.cagerattle.com
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Re: Oil on plug?
This plug had 8000 miles on it when I discovered the problem:
 I installed new plugs, and pulled them after about 400 miles. Note the chip out of it: 
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CFX 1st Place Mild ------------------------------------------------------------
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06-04-2008, 12:25 AM
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#4 (permalink) | |
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NECO Member
Join Date: Jan 2004
Location: Fort Erie, ontario
Posts: 2,237
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Re: Oil on plug?
Quote:
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MICH, 99 laser red Roush cougar MTX - Msds-Injen/GMK-magnaflow-ford racing-svt-Xcal2-b&g-kyb-tezzen-clarion-earthquake Last edited by michcougar; 06-04-2008 at 12:31 AM. |
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06-04-2008, 12:25 AM
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#5 (permalink) | |
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McCain/Palin '08!!
 
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Re: Oil on plug?
I had a similar problem, and replacing the valve cover gaskets and the O-rings around the spark plug holes seemed to fix my problem.
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06-04-2008, 12:27 AM
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#6 (permalink) |
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www.cagerattle.com
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Re: Oil on plug?
If the threads are getting wet in oil it's usually the valve cover O rings, but if the end of the plug is fouled, like mine was, that's much worse. I can't remember the compression numbers exactly, but the other 5 cylinders were around 180 or 190, and cylinder one was around 110...
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CFX 1st Place Mild ------------------------------------------------------------
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06-04-2008, 12:44 AM
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#7 (permalink) |
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NECO Member
Join Date: Jan 2004
Location: Fort Erie, ontario
Posts: 2,237
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Re: Oil on plug?
Think this could have anything to do with me running rich and failing emisions?
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MICH, 99 laser red Roush cougar MTX - Msds-Injen/GMK-magnaflow-ford racing-svt-Xcal2-b&g-kyb-tezzen-clarion-earthquake |
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