[wiswind]

On my '96 3.8L windstar.
Vehicle speed sensor went out......I still had the speedometer (cable was connected).
The SAME unit that the cable connects to......on the back side of the transmission also has a electrical connection for the PCM.
This part is not expensive, but is a real pain to change.
It is above one of the catalytic converters....and you are going by "feel" as you cannot really see what you are doing.
The speedometer cable has a connection under the big flex hose that goes from the air filter to the throttle body.
I would disconnect it at this point.....and then, from under the vehicle, feel around to find the speedometer cable.......it will lead you to the sensor.
Make SURE to have the vehicle raised and secured in a safe manner before going under it.
The Vehicle Speed Sensor is held in place by 1 bolt.
I don't have any pictures of the VSS replacement as mine went out on a trip.....FAR from home and I had Lane Transmission, just outside of Tracy City replace it for me........good people.

Low EGR flow could be the EGR ports in the lower intake manifold.
I have pictures that show how to get to them and clean them......the link in my signature takes you to the pictures.
The upper intake manifold gaskets are re-useable.....make sure that the gaskets and seating surface on the lower intake manifold are clean.
When you clean the ports.....use care to avoid getting anything down into the intake ports in the lower intake manifold.
At this time, see if the IMRC shafts work.
Springs hold them OPEN with no vaccum (as with motor not running).
The Vaccum from the intake (through the IMRC vaccum control solenoid) pulls them closed.
Getting a IMRC actuator from a junk yard is risky, because you run the risk of the used part having a damaged (leaking) diaphram also.