1991 Ford Escort #4 spark plug & air filter

1991 FORD ESCORT
79,000 MILES • 4 CYL • FWD • AUTOMATIC
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MILLER7764
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my #4 piston keeps fouling out my spark plug, also I found a good amount of oil in my air filter. what might be causing this t happen.
Jun 17, 2010 at 10:33 PM
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MHPAUTOS
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Engine blow by will be your problem, this is when you have a ring problem and compression is leaking into the sump this oil is in suspension in the air and excess pressure is entering the air filter via the breather, the oil cools and drops out of the air and lays in the air filter.

mark (mhpautos)
Jun 18, 2010 at 3:53 AM