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most test hydrocarbons, co2 & oxides of nitroge (nox). Specs vary with vehicle, year make, model & engine size

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Q: What are the Vehicle emission tests requirements?
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Are emission tests mandatory in Texas for vehicle inspection?

No.. not by the State. of Texas.


What is the difference between emission inspection and safety inspection?

In an emission inspection a facility or vehicle is being inspected to determine whether its emissions to the environment are in compliance with regulatory requirements. In a safety inspection, a facility or vehicle is being inspected to determine whether it meets regulatory requirements for safety during operation.


What is the purpose of a vehicle emission test?

The purpose of a vehicle emission test is to make sure that a vehicle is not emitting harmful toxins into the air. What is tested for varies by state but mainly looks for carbon emission.


What is a zero-emission vehicle?

A zero-emission vehicle is a vehicle which produces only carbon dioxide and water as its emissions and therefore does not pollute the air.


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Where is the vehicle emission control label located on a vehicle?

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Are 1973 Datsun 510s smog free?

In the State of Connecticut, USA any vehicle over 25 years of age is exempt from emission tests. I don't know about your State.


What paper works do you need to change the engine of your car?

If your replacing it with a remanufacturered one, none. If your going to a carbureted engine, it might not meet emission requirements based on the year of the vehicle.


What are emissions tests?

emission tests are when a car needs to be tested for how much toxic air the car is putting out.


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