Question about 1991 Honda Prelude

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White smoke and a smell of fuel

92 chevy blazer 4.3 vortec. with white smoke comming out of the tailpipe and a strong fuel smell. i replaced the intake gasket and the fuel lines inside the plenum.also the oil has a strong gas smell. i have not noticed any water in the oil.

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  • hotshot_shel May 24, 2009

    Also when i after changing the intake gasket and trying to start it i pull the # 3 plug out (drivers side #2) and fuel poured out. I pulled the plenum again and their was fuel standing inside the plenum. That is why i replaced the fuel lines in the plenum.

  • Anonymous Mar 24, 2014

    don't knw whats wrong

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The white smoke is from anti freeze. The smell of gas in your oil is probably from the same cause. I do beleive you did not clean the milled ares good enough before installing one or both of your gaskets. Just in case you did loosen one of the head bolts up for any reason....One bolt I do beleive on the right front bank of this engine has to be also sealed before re enstalling it for coolant will pass through it if not sealed

Posted on May 24, 2009

  • frank thomas wilson
    frank thomas wilson May 24, 2009

    check your feul pumps pressure. It maybe bad

  • frank thomas wilson
    frank thomas wilson May 25, 2009

    If your pushing more than 5 pounds of fuel pressure you need a new pump

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I have a 99 chevy blazer it smoke when you give it gas it dont smell like oil no water is coming the tailpipe it is a strong smell of gas


Sounds like a bad head gasket. This will need to be replaced soon if its bad enough to be smoking. One way to find out if this is the problem, is to look at the oil filler cap, if there is corrosion, white residue, or water, you most likely have a bad head gasket. Also check the oil thru the dipstick, if it looks
Like theres water or antifreeze in the oil this is also a sign of bad gasket.

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Why is a very strong gas smell coming from my tailpipe?


White smoke is water vapor and in this cold climate it is normal. Strong gas smell is not normal although you may smell some while engine is warming up. Bad cat converter can produce smells, but usually more like rotten eggs. If engine is running rough and seems rich, check coolant temp sensor. Bad converter can cause stalling too. Otherwise, idle speed is controlled by idle air contol motor which can get dirty and stick. Any codes set?

Feb 18, 2015 | Cars & Trucks

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I have a 92 blazer 4.3 vortec


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.

Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

Mar 04, 2012 | Cars & Trucks

1 Answer

I have a 92 blazer 4.3 vortec


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.

Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day

Mar 04, 2012 | Cars & Trucks

1 Answer

I have a 92 blazer 4.3 vortec


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.

Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

Mar 04, 2012 | Cars & Trucks

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You most likely have a bad fuel pressure regulator which is causing the fuel to dump into the cylinders and flood the car.

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