The air intake valve/choke on carberator/ fuel block will not funtion properly , open up, it is continuely closed chokeing no air intake, there is a vacume line not connected, on this carb, does it control the opening/closeing on the carb, and where does it belong connects to where, it's on my 1991-190-e fuel injected

I'd say the throttle doesn't choke properly. Older carburetors used mechanical link with a thermostat to choke the carburetor meaning the intake flaps would close so the fuel mix would be extra rich in fuel. Once it was warm the thermostat would disengage and the throttle would open up allowing more air and thus better efficiency. Not knowing how old the vehical is makes this a bit tough. Have you cleaned the MAS sensor? Bad air flow detection could make the computer think it's running too rich so it may lean out the fuel equation to compensate.

The automatic choke is either stuck open or not operational at all.

Fuel filter or fuel pump comes to mind.

After 20 years on the road, the carb need to be taken apart and cleaned. It's a work for a mechanic.

Well the choke has an electric part that heats up and makes the choke open in a few minutes. As soon as the engine starts the choke should open about 25 percent by way of a vac pull-off.
You can take the air cleaner off and watch the choke while someone starts the engine cold. If the choke does not open after it starts, check the choke pull-off. You can also open the choke with a screwdriver to see if the engine clears up.

Check the fuelpreasure make sure you are gettin g enough fuel, next is check the idle air control valve, it sounds like its getting to much air and not enough fuel if you block off intake you air restricting the air, also the map sensor check that also.

I replaced the upper & lower manifold runners seals, now it runs perfect, The reason it runs ok when warm is because the manifolds expand and seal the gaps on the surfaces that the worn old seals are not closing. Also change the spark plugs.

One problem is related to the other.The dieseling is caused by a rich air/fuel mixture which is caused by the closing choke.So you need to adjust the choke to where it is slightly open when the engine is cold.If it is electric then it has a thermostatic device that positions the choke just cracked open when cold and slowly opens as the engine heats up.Whats happening is the choke may actually be loose and when the engine shuts off the vacuum pulls the choke close creating the combustable rich fuel mixture(if you watched the choke when someone else turns off the engine you'll see the choke flapping while the engine is dieseling).Try putting a screw driver in the carb(with engine running) blocking the choke from closing.Then shut the engine off.It shouldnt diesel.You may have to replace the carb thermostat

your pistons have all been burning oil. there is a break in a seal somewheres and will need to be serviced. continual usage without repair will ruin your engine.

Check:
- Fresh Air Intake Hose: Clogged or Damaged FreshAir Intake Hose.
- Carburetor: Worn, Faulty or Damaged Carburetor.
- Mass Air Flow Sensor: Damaged, Loose, or Faulty Mass Air Flow Sensor or Circuit.
- EGR Valve: EGR Valve Sticking Open/Leaking.
- Idle Air Control Valve: IAC Valve Sticking or Faulty.

Good luck.