I need to know what part(s) are making my car do this
 

I've gotten my idle smooth again (though i will still need to get the idle mix and speed correctly set) but my start up worries me.

Here is what is happening:

1. start the car
2. engine sounds and feels rough for about 2 - 5 seconds (almost like its missing) or waaayyyy to rich - no black smoke though)
3. then all of a suddend it revs up to1200 rpm or so and is smooth.
4. from this point on no real problems.

What components come into play right when the key is turned?

btt

Get the mix set and see if that affects matters before you tear your hair out over it...

ianc

I wonder if you have full fuel pressure immediately upon startup? Can you run the fuel pump for 5-10 seconds prior to startup and then start the engine as normal?
OR
There is a test port for fuel pressure on the driver's fuel rail. Can you hook something to this and test the pressure?