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Page Title:
Engine will not idle but runs well under load |
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 49. TROUBLESHOOTING ENGINE ASSEMBLY - Continued
Corrective action
Probable causes
Malfunction
a.
Repair defective nozzle
a.
Defective fuel injection
Engine will not idle
6.
and holder assembly
nozzle and holder assem-
but runs well under
(par. 83). Replace
bly.
load.
(par. 83) when damaged
beyond repair.
Fuel injection pump not
b.
Check and adjust fuel
b.
injection pump (par.
properly timed.
c.
Adjust fuel injection
c.
Fuel injection pump
governor not properly
pump governor. Refer
adjusted.
to TM 9-2910-223-35
for procedures.
Replace fuel injection
d.
Defective fuel injection
d.
pump (par. 83).
pump.
Engine exhaust
7.
smokes.
Repair defective fuel
a.
a.
(1) White or gray
Defective fuel injector
injector nozzle and
nozzle and holder as-
smoke indi-
holder assembly (par.
semblies.
cating unburned
83). Replace (par. 83)
fuel or engine
when damaged beyond
oil.
repair.
Engine cylinders.
Refer to TM 9-2320-
b.
b.
235-10 for operating
instructions of intake
manifold flame heater.
Operate flame heater
intermittently. Start
and load engine to in-
crease cylinder head
temperature. When
engine temperature is
not within 180F to
200F, remove coolant
thermostat, (par. 76),
test the thermostat
when necessary (par.
c.
Service primary and
Water in fuel.
c.
final fuel filters (par.
72). Refer to TM
9-2320-235-20, drain
vehicle fuel tank and
fill with clean available
fuel.
40
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