Mechanical Inspection: Compression

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Perform KOER CYLINDER CONTRIBUTION SELF-TEST under QUICK TEST in SELF-DIAGNOSTICS - EEC V - DIESEL article. Service any DTCs that are present. The following are possible causes for failing this test:

Broken Compression Rings
Burnt Or Bent Valves
Bent Push Rods
Bent Connecting Rods
Damaged Rocker Arms
Faulty Fuel Injector Assembly