3.3.2 Case Description about Insufcient Output (2)
● There is insufcient output when engine is in large load, but
there is no big smoke.
● Inspect air lter, turbocharger and initial angle of fuel supply
are normal.
● Inspect whether low pressure fuel passage and every pipe
are leaked. When check fuel lter, we nd that fuel lter and fuel-
passed screw lter net of fuel pump are dirty and blocked and that
fuel passage isn’t circulated, which causes high pressure fuel pump
can’t supply fuel and output is insufcient.
Block fuel filter element and fuel-passed
screw lter net of fuel pump
Add water lter, replace fuel
filter element and fuel-passed
screw lter net of fuel pump
Case analysis
Remedy
Block lter
element
Block lter
element