Table 1. SPN#157, FMI#18 ― Fuel Pressure Lower Than Commanded Pressure -- Continued.
TEST OR INSPECTION
5. Repeat tests 1 through 4 for
1. Record fuel flow reached, turn
the rest of the fuel rail outlets.
keyless engine switch to OFF
position (TM 5-3895-385-10).
Review recorded flow rates. The
flow rate will decrease below the
maximum specified flow when
the cylinder with the leak is
blocked. If there is not a
significant change in fuel return
flow while cutting out one
injector, there may be a problem
with more than one injector.
Compare the fuel flow difference
across all injectors. If there is
more than one injector that
caused a noticeable decrease in
flow, those could be the injectors
with the problems. Restore
equipment to original condition,
and replace affected fuel
injector(s) (WP 0338, Vol 2).
2. If a noticeable decrease in
recorded flow rates is not
present, restore equipment to
original condition, and replace
fuel pump (WP 0329, Vol 2).
END OF WORK PACKAGE