WPS500X Compression Test graphs internal cylinder pressure

The WPS500X graphs the internal pressure in a cylinder whilst the engine is running. The ultimate compression test - not just peaks

VW Polo Misleading Fault Codes - Everyday Diagnostics

Pressure School - Part 2: A Running Diagnosis - Professional Motor

Maths is cool - part 6

In-cylinder pressure during snap test (gasoline)

Compression Wave Forms

WPS500 in cylinder pressure testing just getting started – Diagnostic

Pressure School Introduction to the Pressure Transducer

In-cylinder pressure during cranking (gasoline)

Compression Testing - Garage Lube

Gears Magazine - Pressure and Vacuum Diagnosis, Part III: Running