Description
This video breaks down EGR systems in a clear, technician-friendly way that connects emissions theory to real-world service. Starting with a simple question, it explains how Exhaust Gas Recirculation reduces harmful nitrogen oxides by lowering combustion temperatures. The discussion covers why EGR has been used since the 1970s, how modern electronically controlled valves precisely manage exhaust flow, and how this impacts fuel economy, engine performance, and emissions compliance. It also ties common service issues—like carbon buildup and clogged valves—to the system’s design and function. Overall, the video shows how understanding EGR operation helps technicians diagnose problems faster, recommend the right parts, and explain repairs with confidence.