This is itching my brain... unplugged wire behind cyl 4.
While working on my 4.6L Crown Vic, i stumbled
upon a unplugged wire routing from the engine
wire harness. Right behind cyl 4. Been trying to
find where it plugs into for weeks. Anyone willing
to share any knowledge, Would be a great service.
That's actually a vacuum hose, not an electrical plug. Possibly for the heat/air conditioning system. Check the vacuum hose routing diagram under the hood. It's part of the emissions decal. HTH. -Jim
I wonder if it goes to the EGR valve?
Good point, Bob! -Jim
I have a similar engine and the EGR valve is near that vacuum connection.
Plugs into the top of a stud off of the fuel rail back bolt
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