Need some suggestions!
I have a 1977 B210. Car was running smooth as a babys arse one day and then i started it and the idle was real rough, I replaced just about everything that would cause the problem but it still has the rough idle. I have not replaced any emition control parts yet because I dont know where to start. Someone advised me to replace the charcoal cannister? Help me out please! ferg

Check your choke and make sure it's opening all the way at idle when the engine is warm. That was my problem.

I had and have sometimes that same problem with my A14 b210, One day is running fine and the other is running rough, but the last time i changed the ant-dieseling solenoid and adjust the mixture screw and is fine now, but from times to times i got to adjust it again, especially when i push him a little bit more!

This problem is unlikely to be emission control-related.

Does it idle the same when cold, when hot, or both?

most common prolem is old-fashion vacuum leaks.