(Basic) Engine Compression Diagnostics by John Gelsimino Jr. A brief comparison of dry compression, wet compression, and leak-down tests. Read Article at MH Network Dynamic Duo by Mark Warren How to use a current clamp and oscilloscope combination to check cranking compression and the starter motor. Read Article at Motor Magazine Lab Scopes and Pressure
Fuel Injector Circuit Waveforms by Andrew Markel This article explains the basics of a solenoid injector’s voltage and current waveforms. Read Article at Tomorrows Technician Testing Piezoelectric Injectors by Joe Clark A look at some methods of testing piezoelectric injectors, both on-engine and off-engine. Read Article at TechTips.ie Diagnosing and Servicing Gasoline Direct Injection
Secondary Ignition: The Art Of Spark by Scott Weaver This article describes the components of a conventional distributor ignition system, and how they produce a spark. Scott also shows what a (secondary coil) ignition waveform looks like, and describes its different parts. Read Article at Tomorrow’s Technician Maintaining Engine Spark by Mac Vandenbrink An explanation