Question about 1989 Pontiac Grand Am

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Rough idle and black smoke from tailpipe - 1989 Pontiac Grand Am

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  • Anonymous Mar 26, 2014

    black smoke from tailpipe?

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Black smoke indicates unburnt fuel.....and unstable idle, means you are properly missing one or morre cylinders.......have you recently had a tuneup or maintenance performed on your car

Posted on Sep 13, 2010

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  • Contributor
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Sounds like you need a tune up the spark plugs are not burning off all the fuel replace plugs wires distributar cap

Posted on Sep 13, 2010

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Posted on Jan 02, 2017

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SOURCE: Jeep running rough; black smoke from tailpipe; dying occasionally

Have you taken a spark plug out yet? You may have fowled them out. if they are not clean and have a whitish tone to them, then they need to be replaced.

Posted on Nov 28, 2008

  • 341 Answers

SOURCE: my truck blows white smoke

white smoke is is antifreeze problem cracked head.. head gasket.. intake gasket .. pull yout spark plugs check color of plugs if one looks real clean compared to the rest that will give a point where the problem is

Posted on Dec 07, 2008

  • 23 Answers

SOURCE: Tailpipe BLACK , exhaust reaks of gas !

garage mans company.
broken plugs.

Posted on Mar 12, 2009

frcs68
  • 1605 Answers

SOURCE: MY 96 Nissan Maxima has rough idle and is blowning

blown head gasket. black smoke means that oil is getting into the cylinder.

Posted on Jun 11, 2009

  • 1374 Answers

SOURCE: Cold start-extremely rough idle-Shakes,smell fuel

Black smoke means buring rich. Have the vehicle's ECU scanned for codes and do the repair the codes describe. I'm gonna take a stab in the dark and say Mass Air Flow Sensor.(MAF)

Posted on May 07, 2010

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Hi there:
Black smoke is caused by excess fuel that has entered the cylinder area and cannot be burned completely. Another term for excess fuel is "running rich." Poor fuel mileage is also a common complaint when black smoke comes out of the tailpipe. Black smoke out the tailpipe is the least cause for alarm. Excess fuel will usually effect engine performance, reduce fuel economy, and produce a fuel odor.

How did the fuel get into the cylinder in the first place? Some of the causes of excess fuel are a carburetor that is out of adjustment, a faulty fuel pump, a leaky fuel injector, or a faulty engine computer or computer sensor. If black smoke is present, check the engine oil as in the white smoke example to make sure excess fuel has not contaminated it. Do not start the engine if a heavy, raw fuel smell can be detected in the engine oil. Call your mechanic and advise him of what you have found.

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