Operation & Maintenance Manual for WP7 Euro Ⅵ Vehicle Diesel Engine 3 Common failures and Troubleshooting 3.1 The engine fails in starting 3.2 The engine stops soon after starting 3.3 Engine Power is insufficient 12 Causes Troubleshooting 1. Fuel pipe is blocked Check and remove the blockage and check if the fuel is clean 2. There is air in the fuel system Release the air and check air tightness of joints 3. High pressure fuel pipe is damaged and fuel leaks out Repair it or replace it with a new one 4. The ambient temperature is too low Use auxiliary start device 5. There is few fuel or no fuel left in the tank Check and refuel Causes Troubleshooting 1.
Fuel filter is blocked Disassemble the filter to clean and dry the inside; or replace it if necessary 2. There is air in the fuel system Check the tightness of fuel pipes and the joints; check if the bleed screw is tightened; release the air 3. Fuel is of poor quality, containing too much water Wash the filter and use high quality fuel Causes Troubleshooting 1. Air inlet pipe is blocked (air filter is blocked) Check and clean the air filter and air inlet pipe or replace the element 2. Exhaust back pressure is high Check if the exhaust pipe is blocked 3. The pressure of turbocharging system is insufficient Check and remove any leakage with the exhaust pipe 4.
Fuel pipe leaks or is blocked Check the tightness of fuel pipes and the joints; check the fuel pipes and check if the filter is dirty; Repair or remove any blockage; replace the filter element 5. Poor fuel quality Wash the fuel tank, filter parts and fuel pipes; replace the fuel 6. High oil level Release the extra lubricating oil