Idle Problem

[SBL]

Probably too far to travel. I live on Treasure Island on the Gulf. About 30 miles west of Tampa. I have almost always figured out idle problems, although it can be an iterative process.

Do these few things for fun.
Unplug the computer. Tell us what the idle speed is then.
Same for the o2 sensor.
Are you able to feel the idle speed motor work to try to adjust the idle?
Can you hear the frequency valve buzzing?
What position are the brass screws in?
There are often paint marks on the curb idle screw. Can you put it back where it was from the factory?
Is your mixture control screw available? Let me know and then we can proceed.
It goes without saying, check every vac line that you can. There are some that are not accessible, but check them all. Look ate the vacuum canister. I once saw a crack in that which gave crazy idle problems.
Open and clean the control pressure regulator screen and reassemble.
Is the brass tube ("of agony") termed the Auxiliary Air Pipe in position and is the O ring OK? There is another O ring that is used on a tube from the cold start valve to the air intake. Is it OK?

What about any details of the cars history? Gunk in the gas tank (I had the worse one in history, 3/4 full of thick goo)?

[Iceguy]

Thanx Steve, I printed out the list & will start checking things out. I know there is no gunk in the gas tank. I pulled the fuel pump a while back when the motor was stopping after 4 min. That ended up being the RPM relay. What I know of the cars history is that it was sold new in Va. sat in a collection until a guy in Sarasota bought it, he passed and I got it from a dealer over there.
And you really aren't that far - when I have an AAA card in my pocket !

[Iceguy]

I unplugged the computer & RMP went to 1000 for aprox 1 min, then shut down.
I do have the mixture control screw.
I think I've checked vac lines & have not found anything - yet.
Still working down the list.

[Iceguy]

I think I'm getting closer to my problem. My car is running rich - I can smell it & see the smoke. Could this be a bad cold start valve - or warm up regulator ?

[Bitsyncmaster]

I think I'm getting closer to my problem. My car is running rich - I can smell it & see the smoke. Could this be a bad cold start valve - or warm up regulator ?

It could be but unless you can get some measurements (primary pressure, control pressure and dwell) everyone will be guessing what is the problem,