There should be a tube from the carburetor going down to the exhaust manifold and back up again to the choke housing. When engine starts and the manifold gets hot, it warms the air going through it. This hot air gradually opens the choke blade by heating the spring inside the housing.
Problem with my car is that the cold air tube from the carburetor was missing completely and the hot air tube had broken off from the manifold. Some rusted remains were still in the manifold so I don't think I can attach the tube without replacing both. Perhaps I should just replace the hot air choke with an electric one...
While investigating the choke, I also checked the accelerator pump again. I opened it up and noticed that the small rubber elastomer valve under it was not correctly in place. I pushed it in, closed the pump cover and started the car. This time the pump worked perfectly. I took a test drive and the whole car handled much better when accelerating. I also tuned the choke settings and this seemed to correct the high idle speed too!
Finally, as the weather was a bit better today, I continued the paint cleaning chore. I snapped a photo of the half cleaned hood. It's pretty clear how big difference the cleaner wax does.
Unfortunately it's pretty hard and annoying job. I still have to roof and sides to go though. I don't want to use a polishing rotary tool as the tar has stuck on so hard. There's a risk of damaging the paint when trying to remove them.
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