Lussier's Educational Series: Advanced Fuel System Operations & Diagnosis

Welcome to the first installment of Lussier's Educational Series In this class, we take a deep dive into the science and strategy behind modern fuel control systems. While many people think fuel system diagnostics are all about fuel pressure and injectors, proper diagnosis requires understanding how the engine control module uses airflow data, sensor feedback, and fuel trim calculations to determine exactly how much fuel to deliver under every operating condition. Topics covered include: • Fuel injector construction and operation • Return-style and returnless fuel systems • Demand-regulated fuel delivery systems • Airflow measurement using MAF and MAP sensors • Engine control functions and fuel calculations • Electronic Fuel Injection (EFI) system operation • Oxygen sensor operation and feedback • Short-term and long-term fuel trim analysis • Open loop vs. closed loop operation • Driver intent and throttle control strategies • Diagnostic approaches for fuel system concerns • Real-world case studies and waveform analysis Throughout the class, we explore how modern engine management systems use sensor data to calculate fuel delivery, maintain proper air-fuel ratios, and adapt to changing operating conditions. We also discuss practical diagnostic techniques that help technicians identify the root cause of drivability concerns rather than simply replacing parts. Whether you're an experienced technician, a student entering the industry, or someone looking to expand your understanding of automotive technology, this presentation provides a solid foundation for understanding how modern fuel systems operate and how they should be diagnosed. This was the first class in Lussier's Educational Series, with future classes covering additional automotive systems and diagnostic topics. Be sure to like, subscribe, and follow for upcoming training opportunities and educational content.