1.1.3 Insufficient power 8 Fuel filter A fuel filter component is clogged. Replace the fuel filter component or the filter element. Fuel feed pump The fuel feed pump is broken. Repair or replace the fuel feed pump. Fuel injector The fuel injector is jammed. Replace the fuel injector The opening pressure of fuel injector is too low. Atomizing is bad. Adjust or replace the fuel injector Injection pump The damage of delivery valve results in fuel dripping after injection. Replace the delivery valve Injection timing is not proper. Adjust injection timing The injection volume is too low. Increase injection volume The idle speed spring is broken.
Replace the idle speed spring The shifter is broken Repair or replace the shifter The regulator valve is not at proper position. Adjust or replace the regulator valve The plunger spring is broken Replace the plunger spring The plunger is worn. Replace the plunger assembly The cam is worn. Replace the worn cam Valve clearance The valve clearance is not proper. Adjust the valve clearance Compression pressure The gasket of cylinder head is worn. The cylinder liner is worn. The piston ring is sticky. Replace relevant parts Check Causes Remedies Air filter An air filter component is clogged. Clean or replace the filter component Fuel There is water in the fuel.
Replace the fuel Fuel filter A fuel filter component is clogged. Replace the fuel filter component or the filter element Fuel feed pump The fuel feed pump is broken. Repair or replace the fuel feed pump Fuel injector The fuel injector is jammed. Replace the fuel injector The opening pressure of fuel injector is too low. Atomizing is bad. Adjust or replace the fuel injector High pressure fuel pipe The high pressure fuel pipe is damaged or blocked. Replace the high pressure fuel pipe Injection pump The regulator valve is damaged. Repair or replace the regulator valve