230 issues (again)

[jdl71]

So after this issue was resolved it ran great. I was driving it a few miles a week and noticed it started getting harder to start, idling worse, needing more and more choke until now when it won't idle at all. It will only run with the choke almost all the way shut and it sounds like the engine is going to run away, it's going probably 3000 rpm without touching the throttle. It also has what is best described as a popping or sputtering almost helicopter type sound from the exhaust. An attempt to open the choke results in backfire through the carb and dying. Sound like a massive vacuum leak? I have tried spraying carb cleaner around all possible spots while it was running and couldn't find anywhere that made a difference. I am running fresh gas out of a can using an electric pump. I have checked timing. I have swapped with a spare carb. I have checked point gap. I pulled the plugs and they are clean. Plugs,wires, cap, rotor condensor and points all have about 50 miles on them. I pulled the valve cover and turned the engine over and everything seems to be moving like it should. Help....

http://www.youtube.com/watch?v=jW_cPU4BjOU

http://www.youtube.com/watch?v=xaFDDypyXtI