1991 Buick Century Q&A

1991 Buick Century Question: what can be causing black smoke to come from the exhaust during acceleration?

it just started happening, but only seems to occur when the throttle is pressed, either from driving or from pressing the linkage from the engine -
Answer 1
Could be anything Is the smoke grayish white smoke? -
Answer 2
Engine is running rich! Have the fuel system componets and related sensors tested! -
Comment 1
I cleaned the throttle body and the MAF sensor and that seemed to help a little bit -
Answer 3
Agree with #2, to much gas. -
Comment 1
that was one of the first things I noticed was the poor gas mileage, that 3.3 was sucking it down like a v8 -