Have the computer scanned for trouble codes. The problem may be a bad Throttle Position Sensor (TPS) or Idle Control Valve (ICV).
Run a compression test to verify the condition of the engine.
the 96 fordwindstar sucks
It could be a dirty air filter or a dirty throttle body.
NAPA and Precision Tune and Auto Zone have a free analyzer check. Use it.
Throttle linkage could be in a bind or TPS is defective. (throttle Position sensor)
leaking intake gaskets...
A good chance its the Idle Control Valve
mine is doin the same thing
u have a cylnder low on compresson
There are several things that can cause your 1999 Ford Crown Victoria to idle rough when it is cold. The most common cause is a leak in one of the vacuum hoses.
can you use a transmission from a 1993 ford ranger in a 2000 ford ranger?
I would say that the timing is off, if it has distributor and not coil packs try to turn the distibutor some.