Where is the smoke it coming from?
Do these symptoms only occure during accelaration or idling, or both?
Do your idle problems occur at start up or after the engine is warmed up? Are the symptoms sporadic or do they happen consistently.
I'd suggest checking your timing and replacing your sparkplugs if they're fouled. Make sure there are no air leaks anywhere. Also check your throttle cable and throttle body. Make sure that they move freely and smoothly.
But, in the end, you might just have bad piston rings (Or at least an oil leak somewhere). That would explain the black smoke.
Anyway, happy hunting.
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