Which diagnostic test determines if there is a volumetric efficiency problem?

The diagnostic test that determines if there is a volumetric efficiency problem is a dynamometer test, often used in automotive diagnostics. This test measures the engine's power output and compares it to the expected output based on its specifications. A significant discrepancy can indicate issues with volumetric efficiency, such as poor airflow, intake restrictions, or exhaust blockages. Additionally, tests like manifold pressure measurement or airflow analysis may also help identify related problems.