1988 Honda accord carburetor questions

The adjustment screw on driver side is for the electrical load and A/C fast idle compensation. It should be adjusted only when the A/C is turned on. If it is equipped with a double vacuum, the rear has an adjustment for electrical load.

The passenger side is for the autochoke function. When vacuum is released, the actuator should push the throttle plate open to allow the autchoke to work correctly when cold. If vacuum is faulty, it would affect cold start. Without it, the autochoke would not work until you push the accelerator pedal.

Thank you Sr.

You gave me very good clues. So That's exactly why I didn't see any effect in the adjustments, The car was in parking with A/C off.
So far the choke is working fine, so I will not mess with the passenger's side actuator.

I did a little trick with the air vent cut-off actuator so the car is now working perfect, when cold and also when in red lights.

This is what I did: after replacing the air intake actuator to let the car to control the temperature of the air getting to the carburetor, and replacing the needle and seat (to avoid the fuel overfloding issue) the car worked OK, but I kept searching for more vacuum actuator's issues, and found the air vent cut-off actuator in the upper side of the carburetor/driver side damaged. I replaced and got the engine stalling in cold as a result. I put the damaged diapragm back and problem solved. I know this is not a normal condition and the carburetor is getting gasoline vapors through this diaphragm, but I will leve as it is until I find the root cause of why by fixing this actuator the engine stalls.

I am sorry I do not understand your description clearly. Is it possible to upload a picture of the actuator that your are referring to?

When carburettor vapor are getting past diaphragms, the diaphragm is bad resulting in vacuum leakage and can cause idling and emission problems.