3.4 Fuel Consumption Is Too High
● Check whether low pressure fuel passage and quality of fuel
are normal. Come into next step if normal.
● Check whether air filter element, air inlet pipe and
turbocharger are normal. Come into next step if normal.
● Check whether valve clearance is normal. Come into next
step if normal.
● Check whether air exhaust pressure is too high. Come into
next step if normal.
● When diesel engine is operating, there is a lot of smoke and
fuel consumption is too high.
● Inspect air lter, turbocharger and initial angle of fuel supply
are normal.
● There is no fuel leakage in low pressure fuel passage and
high pressure fuel pipe.
● High pressure fuel pump is normal, but atomization of 2
injectors is not good, so we judge there is fault in injector.
Case description about fuel consumption is too high
Add water lter and replace fuel head of injector.
Case analysis
Remedy
Needle vale of injector is worn heavily,
and fuel atomization is bad