STEP Diagnostics - Compression evidence worksheet
Documentation aid; obtain the current engine-specific procedure.

Vehicle and exact engine:
Complaint and operating conditions:
Diagnostic question:
Service procedure / revision / applicability:
Method: relative comparison / measured pressure / other:
Equipment and output units:
Required preparation and safety steps completed:
Test conditions and cranking requirements:
Cylinder identification method:

Result for each identified cylinder or unidentified event:
Original output file reference:
Applicable criterion and source:
Repeat result and changed conditions:
Supported conclusion:
Required confirmation test:
Confirmation result / units / criterion:
Evidence establishing cause:
Unresolved questions and next action:

A relative percentage is not measured pressure. No universal difference or pressure limit is supplied. This record does not replace safe engine-specific testing instructions.