Diagnosis And Testing - High - Pressure Fuel Line Leaks
| 1 - High-Pressure Line |
| 2 - Cardboard |
| 3 - Typical High-Pressure Fitting |
- High-pressure fuel line leaks can cause starting problems and poor engine performance.
WARNING:
High-pressure fuel lines deliver diesel fuel under extreme pressure from the injection pump to the fuel injectors. This may be as high as 200, 000 kpa (29, 008 psi). Use extreme caution when inspecting for high-pressure fuel leaks. Inspect for high-pressure fuel leaks with a sheet of cardboard. High fuel injection pressure can cause personal injury if contact is made with the skin.
- Start the engine. Move the cardboard over the suspected high-pressure fuel line leak, and check for fuel spray onto the cardboard. If line is leaking, re-torque line while engine is shutdown. Replace damaged, restricted or leaking high-pressure fuel lines with the correct replacement line.
CAUTION:
The high-pressure fuel lines must be clamped securely in place in the brace. The lines cannot contact each other or other components. Do not attempt to weld high-pressure fuel lines or to repair lines that are damaged. Only use the recommended lines when replacement of high-pressure fuel line is necessary.