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

 

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TC21, 3.3L V6, Elko, NV, March 20, 2014, 13:08
 Rookie

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

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  • Answer #1

    Action702 March 20, 2014, 14:40
     Journeyman

    Could be anything
    Is the smoke grayish white smoke?

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  • Answer #2

    pushrod March 20, 2014, 14:58
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     Master

    Engine is running rich! Have the fuel system componets and related sensors tested!

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    TC21, March 24, 2014, 16:20
     Rookie

    I cleaned the throttle body and the MAF sensor and that seemed to help a little bit

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  • Answer #3

    G. T. Service Center (4215 Answers) , Stephenville, TX - (254) 638-3236
    ProfessorG March 20, 2014, 15:54
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     Master

    Agree with #2, to much gas.

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    TC21, March 24, 2014, 16:24
     Rookie

    that was one of the first things I noticed was the poor gas mileage, that 3.3 was sucking it down like a v8

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