I have leaned off the carb as much as possible but the tail pipe seems a little sooty. I may have choke Problems and have a section from the factory manual to look at servicing the choke. Things is I do not trust the vacuum hose connections- I think the prior owner messed around a little too much.
Does anyone have a diagram showing all the vacuum connections for the carb?
you can see if the choke is openning all the way just by looking at it. if it is wide open after running for a few minutes, it should be ok. is your idle mix too rich? my 89 sidekick has the same thing, and always has, for what it's worth. i think it's just the way they are.