How to perform a compression test with a scope (Verus-Vantage)

Relative compression test using the Snap-On Verus. You do not need a Snap-on scope to do these tests. The same procedure can be followed using any Lab Scope.

Testing procedures shown:
how to use starter current to determine cylinder compression
how to synchronize the starter current pattern with an ignition firing event to determine exact cylinder location

Tools used:
Lab Scope
Low amp probe
High amp probe (preferred)
Secondary Ignition Pick-up

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For more information on this topic, I have written a “field manual” called Engine Performance Diagnostics which is available at www.scannerdanner.com as an eBook or paper book.
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