This article is part of a 5-part series on automotive ignition systems. Part 1 covers the basic purpose of the ignition system, the primary and secondary circuits, the ignition coil,…

This is the sixth and final article in a 6-part series. Part 6 covers diesel compression ignition, the mechanical plunger and governor systems used for diesel fuel metering, and the…

This is the fifth article in a 6-part series. Part 5 explains how the ECM calculates the mass of incoming air using speed-density theory, heated wire sensors, or vortex frequency,…

This is the fourth article in a 6-part series. Part 4 covers how the ECM processes sensor inputs to control fuel delivery, how the oxygen sensor reads exhaust content to…

This is the third article in a 6-part series. Part 3 explains how the injector solenoid converts electrical signals into mechanical motion, how internal components control fuel flow, and how…

This is the second article in a 6-part series. Part 2 examines how fuel injection systems control fuel volume through pulse width modulation, the different ways injectors can be timed…

This is the first article in a 6-part series. Part 1 covers the fundamental theory of gasoline fuel injection systems, including stoichiometric ratios, the basic operating principles of electronic fuel…

This article is part of a 6-part series, Part 6. It covers the different classifications of carburetors by airflow direction and barrel count, as well as the basic principles of…

This article is part of a 6-part series, Part 5. It covers how altitude affects air-fuel mixtures, how intake manifold design distributes the charge, and how air filtration works. Understanding…

This article is part of a 6-part series, Part 4. It covers the different fuel circuits inside a carburetor, including idle, power, and cold start systems. Understanding these circuits matters…