Focus Fanatics - View Single Post - Oil, gas in intake manifold????
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Old 12-08-2012, 01:39 AM   #6
Focus Rookie
Join Date: Dec 2012
Fan#: 107068
Location: California, MD
What I Drive: 2003 Pitch Black Focus ZX3 Hatch

Posts: 22
FF Reputation: 1 kensaysrawr Good Standing Member
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Is it from the recycled crankcase air? I had this problem from a Honda I had. the recycled crankcase gasses were greasing up my IM and gumming up my PCV valve. I fixed it by removing the hose that carries the gas from the valve cover to the IM and replaced it with a small breather filter.

But as far as the fuel, its a really good question. I have no idea how fuel would work its way up instead of following vacuum down into the cylinders.
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