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Discussion Starter #1
The two front fuel injectors (left and right) in my 4.6L
are dirty with black engine oil. Ford just replaced my
intake manifold a month ago (the orginal manifold
was actually OK.) Any clues? I can't think why
oil goes to injectors, and yes just two of them.
I can smell something from there after a relatively
long drive. Any input appreciated!
 

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If the oil was on the outside of the injector tips, I wouldn't worry about the injectors unless you were getting trouble codes. I would worry about where the oil was coming from.

If oil were spilled so it got into the injector O-ring area, it might get sucked past the seal. Some people oil up the seals and bores before installing injectors - less wear on the O-rings.
 
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