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Because - if an engine (powered by fossil fuels) is running - even at idling speed, it's still producing waste gasses - which polute the atmosphere !

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Q: How does switching off idling engines improve the air quality?
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Why switching off idling vehicles?

Because even idling engines use fuel.


Why does carbureted engines idle low and then dies while foot is on break?

turn up the idling!


Is it more economic to idle a diesel than turn it off and restart it again?

I read a report maybe ten - fifteen years ago about an experiment conducted by Mercedes-Benz on heavy-duty truck Diesel engines. They found that switching the engines off and back on again thirty times per minute - i.e., about as fast as it is possible to do - used less fuel than leaving the engines idling for the same minute. This would seem to answer this question! But I cannot find the original source document. Can anyone else help?


How does traffic light synchronization improve air quality?

Cars emit the most pollutants when accelerating. If the lights are synchronized to allow the heaviest flow of traffic to move without stopping and starting the need for acceleration is minimized and pollution reduced. An added benefit is that, since cars also emit more pollution when idling, unless they turn off their engines, allowing more cars to travel in their most efficient engine speed range is enhanced by light sychronization.


Why is your 1986 Caprice idling so high?

Most '86 Caprice engines were fitted with a four barrel carb which requires occasional adjustment to keep idle at reasonable speed.


How do you fix the idling on a 2001 Ford Focus?

my idling on my 2001 ford focus is not idling correct, tried to adjust idling but there is no screw or way to adjust why?


How do you tell if a intake manifold gasket needs replacing?

Irratic idling condition is indication of intake/inlet manifold gasket leak. Change gasket immediately. This particularly applies to EFI engines. Newaz.


Does idling a car waste fuel?

Yes, That is why new cars are coming with a stop-start feature. I the engine will shut off if the car is stationary for a given amount of time( to improve mpg).


What causes a car to vibrate when idling and moving?

Car engines are demanding and require proper care to be taken. Failure to do so can result in problems with fuel, ignition, emissions, and other various systems. A vehicle is said to be idling when it has sufficient power to work the steering or other components but not enough to move the vehicle itself.


How do you make a sentence with idling?

I sat in my car in the driveway with the car idling, waiting for the kids to come out.


What part can you buy to stop fast idling and pulsation idling?

change the mass air flow senser


Why would engine that was idling then suddenly die?

water in the fuel can cause an idling motor to sputter and/or die.