Oil and Oil Filters
Jeep Wrangler
Nissan Armada
Air Filters and Intake Manifolds

What would cause the air filter on your 1994 Wrangler to be full of oil?

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Wiki User
January 17, 2009 3:15AM

This is one of the most common jeep problems. There are two

hoses coming off of the valve cover. One goes to the air filter box

and the other one goes to the intake manifold. The one that goes to

the intake manifold is a vacuum line that breaks or becomes plugged

easily. When that happens the air filter fills with oil. Check to

see if that line is broken, if it is not then take off the end at

the valve cover and take a small pick or nail and stick it into the

fitting and clean out the carbon build up.

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