Can a car run without catalytic converter?

A car can run without a catalytic converter, but it is not recommended. The catalytic converter is an important part of the exhaust system that helps to reduce emissions. It works by converting harmful pollutants, such as carbon monoxide and hydrocarbons, into less harmful substances, such as carbon dioxide and water vapor. Without a catalytic converter, these pollutants would be released into the atmosphere, which can cause health problems and contribute to air pollution.

In addition, removing the catalytic converter can also affect the performance of the car. The catalytic converter helps to create back pressure in the exhaust system, which is necessary for the engine to run properly. Without the catalytic converter, the engine may run less efficiently and produce less power.

Finally, removing the catalytic converter is illegal in many jurisdictions. It is considered a tampering with the emissions system, and can result in fines or other penalties.

For all of these reasons, it is not recommended to remove the catalytic converter from a car.