Quantcast MALFUNCTION 1: Cylinders not firing (insufficient fuel or incomplete combustion) (Continued) - TM-9-2815-220-240106

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TM 9-2815-220-24
ENGINE FAILS TO START AT NORMAL CRANKING SPEED
0008 00
MALFUNCTION 1: (Continued)
Cylinders not firing (insufficient fuel or incomplete combustion).
PROCEDURE
OBSERVATION
ANALYSIS
(Continued) Solenoid
With switch in "OFF" position note
If fuel flow stops, solenoid
Valve and Fuel Filter
that fuel flow stops.
valve is closing properly.
If fuel flow continues, solenoid
valve is defective (stuck open).
With switch in "ON" position,
Fuel Nozzle Assembly:
Fine fuel spray pattern
nozzle should have fine conical
Disconnect lines and
indicates proper nozzle
fuel spray pattern.
remove nozzle
operation.
assembly. Reconnect
lines to nozzle,
No spray pattern, stream of
(position nozzle beside
fuel, dribble, or no fuel
housing) and operate
indicates defective nozzle or
heater system.
plugged felt port filters in
nozzle assembly.
Return Fuel Solenoid
With switch in "ON" position, note  Moderate flow indicates
Valve and Check
fuel flow from check valve
solenoid valve is operating
Valve: Remove fuel
opening.
properly and check valve is
return solenoid outlet
opening properly.
tube after the check
No fuel or restricted flow
valve at rear of engine,
indicates check valve stuck
operate purge pump
closed or felt filters in solenoid
and press heater switch
valve are restricted or clogged.
"ON" and "OFF".
With switch in "OFF" position,
If fuel flow stops, solenoid
note that fuel flow stops.
valve is closing properly.
If fuel flow continues, solenoid
valve is defective (stuck in
open position).
PROBABLE CAUSE
CORRECTIVE ACTION
d. Low cylinder compression.
(1) Check cylinder compression (WP 0033,
Cylinder Compression Test).
e. Throttle linkage disconnected.
(1) Check linkage (WP 0122, Injection Pump
Throttle Linkage and Associated Parts
Repair). (WP 0123 for 2DR)
f. Injection pump or drive deficiency.
(1) Check for deficiencies (WP 0020, Fuel
System Abnormal Conditions,
Malfunction 6).
WP 0008 00-4

 


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