Which of the following inspections is performed with the engine running?

The inspection performed with the engine running is related to exhaust gas measurements, which is a critical process in evaluating a vehicle’s emissions performance. During this inspection, the engine must be operational to accurately assess the levels of pollutants emitted through the exhaust system. This involves measuring concentrations of gases such as carbon monoxide, hydrocarbons, and nitrogen oxides.

While checking for liquid fuel leaks is important, it is typically conducted when the engine is not running to ensure safety, as the presence of fuel can create hazards when the vehicle is operational. Other inspections, like air filter inspection or fuel pressure checks, can also occur with the engine off or require specific conditions that may not necessitate the engine running to obtain accurate readings.

Thus, exhaust gas measurements are specifically designed to be conducted while the engine is operating, allowing inspectors to capture real-time data on a vehicle’s emissions performance.