Do modern cars still emit dangerous amounts of carbon monoxide from their exhaust pipes?

9 Answers

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  • don r
    Lv 7
    20 hours ago

    Yes, if you concentrate it in a closed space.

  • Katie
    Lv 6
    2 weeks ago

    YES they do - even the smallest about of carbon monoxide is dangerous.

  • Edna
    Lv 7
    2 weeks ago

    They don't - not unless there's something wrong with the car's exhaust system. 

  • 2 weeks ago

    A properly adjusted modern engine emits virtually no CO. The old thing of running a pipe from your exhaust pipe into the car to commit suicide now results in suffocation from lack of oxygen rather than CO poisoning.

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  • YKhan
    Lv 7
    3 weeks ago

    You can actually completely eliminate carbon monoxide (CO) by running a leaner mixture of fuel. That means running a less than stoichiometric mix, which means in gasoline engines is 14.7 parts of air to 1 part of fuel. Over the decades, engineers have found that the ideal balance of air and fuel is this 14.7:1 stoichiometric mix. If you give it more air and less fuel, more of the fuel will be burned completely, eliminating CO; it also increases fuel economy. However, running it too lean, brings a new problem, it increases the chances of producing nitrogen oxides (NOX), which is also a really bad pollutant. So the 14.7 ratio is the ideal balance between producing NOX and CO.So in the olden days, when cars only had carburetors, and there wasn't much fine tuning possible, they just aimed to get as close to stoichiometric as possible. Now that most cars have fuel injection, and even better direct fuel injection, where the fuel is sprayed directly inside the cylinder, rather than from outside the cylinder, they have very fine tuning capabilities now. Some modern engines have what is known as a stratified charge system where in some parts of the cylinder they are running a lean mix, and in other parts it's a rich mix, the combination produces an even better than stoichiometric result, because both CO and NOX are reduced even further. Overall it might be a leaner mix, which produces better fuel economy, without additional NOX.

  • 3 weeks ago

    Any gasoline or diesel engine produces CO, along with several other substances. Less than they used to, but it's still there.

  • Anonymous
    3 weeks ago

    My car is ELECTRIC, so no. 

  • 3 weeks ago

    Yes. Any amount is dangerous. The only safe amount is zero. All gasoline-powered cars emit some amount, which means they emit a dangerous amount. Fully electric cars (battery-power only, no exhaust pipe) and hydrogen powered cars (which emit only water vapor or steam, and perhaps air, from their exhaust pipes) do not emit carbon monoxide.

  • Ron
    Lv 7
    3 weeks ago

    Dangerous amounts? All amounts are dangerous. Modern cars produce less of course, but in a for instance inside a garage, it doesn't matter. CO is produced by unburned fuel. In an enclosed area, the less oxygen available, the more CO made

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