Compression Testing
Compression Testing
Compression can be tested as an input using the HHT.
A mechanical problem may be present if the difference in engine speed is > 8 rpm for engines 104/112/113, and > 5 rpm for engine 111.
Any engine speed difference will not present itself in the same manner in all engines, so no conclusions can be drawn concerning the affected cylinder.
If the engine speed difference is greater than the set value, perform a compression/cylinder leakage test to determine the affected cylinder.
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