I have a falcon 94 ef I think, fuel injected auto. It won't idle on start up or when at a set of lights, but runs fine otherwise.

I have replaced the following over the last few months:

Coil pack
plugs (3 days ago)
leads
harmonic balancer

Took it to Ford on friday & they put another idle speed motor on it, but it did not change.
I have since cleaned mine out but still no change.

Any ideas or it goes back to Ford for another check up.

if you have a spare ecu maybe swap it and try that,

reset ecu . What about throttlebody is it clean? injectors when were they last replaced?