I just checked the idle control unit, that has a plunger which contacts
the throttle lever. It's mounted on the driver's side of the TBI.
It's connected by a vacuum line to a solenoid; no servo motors, no
The solenoid is connected to a manifold port. The solenoid also has two
wires connected to it. They disappear into a harness.
I disconnected the vac line on the idle control, connected a length of
hose and pulled a vacuum. The plunger immediately extended about 1/8."
That was after giving the plunger a hit of carb cleaner. Does 1/8"
Does anyone know how to test the solenoid and its two electrical
connections? Do any readers know where it gets its signal(s) from?
Question for IK: How do I use a paper clip and test light to pull
trouble codes? I'm not familiar with obtaining Ford read-outs.
I appreciate everyone's suggestions!