What maintenance actions are typical for ensuring fuel system integrity during PM?

• A. Inspect electrical wiring
• B. Replace filters per OEM, inspect lines and connections for leaks, test pump pressure and fuel flow, check for spray pattern
• C. Clean the compressor
• D. Replace oil filters

Answer: (B)

Maintaining fuel system integrity during PM centers on keeping fuel clean, delivered at the right pressure, and sprayed correctly into the engine. Replacing filters per OEM schedule removes particulates and water that could clog injectors or degrade fuel quality. Inspecting lines and connections for leaks catches potential fuel leaks, which threaten safety and can cause fuel starvation. Testing pump pressure and fuel flow ensures the pump can maintain the required pressure and supply steady fuel to the injectors. Checking the spray pattern verifies that the injectors are atomizing fuel properly for efficient and clean combustion.

Other actions like inspecting electrical wiring, cleaning the compressor, or replacing oil filters don’t directly address fuel system integrity, so they’re not as relevant to this specific maintenance focus.