(X) Excessive Fuel Consumption
Fault Characteristics & Causes
1. Air filter is clogged.
1. Clean or replace the filter element.
2. Intercooler is too dirty.
2. Get rid of impurities and dust on outside surface of
3. High-speed stop screw is not sealed up.
3. Seal up the high-speed stop screw.
4. Tighten fuel pipe joints, replace the pipe.
5. Exhaust pipe is clogged.
5. Get rid of the dirt in the exhaust pipe.
6. Min. no-load steady speed is too high.
6. Adjust the min. no-load steady speed to specified
7. Fuel is of poor quality.
8. Advance angle of fuel supply is improper.
8. Adjust the advance angle.
9. Injector spray is of poor quality.
9. Adjust the opening pressure of fuel injector, check
and clean the nozzle or replace it.
10. Valve clearance is improper.
10. Adjust the valve clearance.
11. Injection pump works improperly.
11. Adjust or replace the injection pump.
12. Compression pressure in cylinder is
12. Refer to the item 2 in (I) “Difficult startup of diesel
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