During miss fire diagnostics it is important to establish good compression readings early in you testing procedure. This does not present to much of a problem for most petrol engines, however it may still require considerable amounts of strip down.
Diesels present a far bigger challenge with countless different adaptors and special gauges required.
A much quicker method is using an oscilloscope with a high amps clamp. Just clip over the battery lead and crank. The relevant compressions of each cyl will show as peaks in the cranking current. A quick measurement will show cranking speed, critical on common rail diesels.
Plus you can observe the condition of the starter motor. 3 for 1 speeding up diagnosis and increasing profits.
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