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.
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Using Volumetric Efficiency to Determine the Health of an Engine
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.
