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Wiring Diagrams for Idle Air Control Valve and Driver's side O2 sensor


Well-Known Member
Hey all,
I have a 1990 5.0 H.O and my harness has been butchered by P.O.
My car runs like total crap on cold starts till 3,200 rpms then comes unglued.
I see that My IACV is completely unhooked and do plugs are visible.
I bought the official FSM for my year of car and no Diagrams are there.
I will take pics in the AM here.
Just need to know the color coding on the harness for the O2 and IACV.
part of the harness is tucked up under the passenger side of car.
Thanks much,