spark plugs

MAZDA PROTEGE
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LAURA JACKSON
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MY SPARK PLUGS KEEPING GOING BAD. I REPLACE THEM AND THEY HAVE OIL OR ARE BLACK. WHAT CAUSES THIS?
1994 MAZDA PROTEGE 1.8L DOHC 110,000MILES
Apr 9, 2007 at 2:25 PM
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RASMATAZ
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[quote:142d0f42e7="Laura Jackson"]MY SPARK PLUGS KEEPING GOING BAD. I REPLACE THEM AND THEY HAVE OIL OR ARE BLACK. WHAT CAUSES THIS?
1994 MAZDA PROTEGE 1.8L DOHC 110,000MILES[/quote:142d0f42e7]

What kind of tune up parts did you replaced? Oil on the sparkplug can be a ring/valve seal/valve problem etc.

Did you check the ignition timing?

When it refuses to start check for spark and comeback.
Apr 11, 2007 at 7:51 AM