Measuring voumetric efficiency can diagnose problems like blocked catalytic converters, bad MAF sensors or vacuum leaks. Glen Beanard show you how to do it with a scan tool.
For the complete article, click here.

Using an OBD II scan tool/dynamometer simulation/calculation program that can graph volumetric efficiency (VE) over rpms, contributor Glen Beanard devised a test sequence using real-world vehicles. This article takes you step by step through his diagnostic process.
Measuring voumetric efficiency can diagnose problems like blocked catalytic converters, bad MAF sensors or vacuum leaks. Glen Beanard show you how to do it with a scan tool.
For the complete article, click here.