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(X) Excessive Fuel Consumption
Fault Characteristics & Causes
Elimination Approaches
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
the intercooler.
3. High-speed stop screw is not sealed up.
3. Seal up the high-speed stop screw.
4. Fuel pipeline leaks.
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
value
7. Fuel is of poor quality.
7. Use specified fuel.
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
insufficient.
12. Refer to the item 2 in (I)
“
Difficult startup of diesel
engine
”
.
