ENGINE FAILS TO START AT NORMAL CRANKING SPEED
THIS WORK PACKAGE COVERS:
TROUBLESHOOTING TABLE AND DIAGNOSTIC TESTS
General mechanic's tool kit (item 121, WP 0176)
Track Vehicle Repairer (2) 63H10
Engine installed in vehicle or ground hop.
Cylinders not firing (insufficient fuel or incomplete combustion).
a. Out of fuel.
b. Air in fuel system.
(1) Bleed and purge system (WP 0020, Fuel
System Abnormal Conditions).
(1) Operate engine intake manifold heater to
assist in starting (refer to pertinent vehicle
c. Cylinders too cold. Applies in cold weather.
(2) If engine does not start, check heater
operation as follows:
Heater Operational Check
Hold fuel shut-off
(engine "stop") switch
and crank engine.
While cranking engine,
engage manifold heater
switch and hand
operate purge pump.
Evidence of heat
operation is normal.
Place hand on intake
manifold heater housing.
Check both sides of
Note housing temperature (warm or hot to
No heat indicates heater
Heater Voltage Checks
Disconnect purge pump fuel hose quick-disconnect coupling at engine
before performing test.
WP 0008 00-1