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Oil in the Mass Air Flow sensor

50K views 32 replies 22 participants last post by  cookie311  
Hi crash19999, I have a Ford focus C-Max 2.0ltr diesel, which is using a lot of fuel (approx 28mpg) and loses power at about 28000 rpm. I have looked in the air inlet and there does seem to be an excess of oil.

This issue has been doing my head in for ages now and has cost money in failed fixes. Thanks for your post, I think I'm now on the right track, I'll let you know how I get on.

Gratefully yours Seamus