Engine Compression Diagnostics Article Roundup

(Basic) Engine Compression Diagnostics

by John Gelsimino Jr.

A brief comparison of dry compression, wet compression, and leak-down tests.

Dynamic Duo

by Mark Warren

How to use a current clamp and oscilloscope combination to check cranking compression and the starter motor.

Lab Scopes and Pressure Transducer Diagnostics

by Bejamin Komnick

This is an analysis of an engine, performed with a cylinder pressure transducer connected to an oscilloscope, which provides lots of detail on compression, and the operation of the accumulator.