1991 Ford Escort #4 spark plug & air filter

Tiny
MILLER7764
  • MEMBER
  • 1991 FORD ESCORT
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 79,000 MILES
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.
Thursday, June 17th, 2010 AT 10:33 PM

1 Reply

Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
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)
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Friday, June 18th, 2010 AT 3:53 AM

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