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

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

by in Elko, NV on March 20, 2014
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3 answers 2 comments
ANSWER by , March 20, 2014
Could be anything Is the smoke grayish white smoke?
ANSWER by , March 20, 2014
Engine is running rich! Have the fuel system componets and related sensors tested!
COMMENT by , March 24, 2014
I cleaned the throttle body and the MAF sensor and that seemed to help a little bit
ANSWER by , March 20, 2014
Agree with #2, to much gas.
COMMENT by , March 24, 2014
that was one of the first things I noticed was the poor gas mileage, that 3.3 was sucking it down like a v8