ORGANIZATIONAL TROUBLESHOOTING - CONTINUED
TEST OR INSPECTION
3. ENGINE CRANKS BUT FAILS TO START OR IS HARD TO START ABOVE 320F (0C) - CONTINUED
Although ignition lock switch must be on and battery ground cable connected to test electrical circuit
voltage, turn off ignition lock switch and disconnect battery ground cable before doing resistance tests
or replacing parts. This will keep you from getting shocked and prevent damage to parts and
fuel metering pump (2). Have assistant turn ignition lock switch (3) clockwise to ignition. Check for
11 to 13 vdc on multimeter. Have assistant turn ignition lock switch (3) counterclockwise to off.
a. If multimeter reads 11 to 13 vdc, notify Direct Support Maintenance.
Check for air in fuel system by priming fuel system (page 2-340).
a. If air was in fuel system, problem should be corrected.
b. If no air was in fuel system, go to step 9.
Inspect fuel lines (4, 5, and 6) for kinks and sharp bends.
a. If fuel filter-to-fuel metering pump fuel line (4) has kinks or sharp bends, replace (page 2-292).
b. If fuel pump-to-fuel filter fuel line (5) has kinks or sharp bends, replace (page 2-288).
c. If fuel shutoff valve-to-fuel pump fuel line (6) has kinks or sharp bends, replace (page 2-264).
d. If all lines are undamaged, go to step 10.
No open flames, welding, grinding, smoking, or use of heat producing devices permitted near fuel tank
and fuel lines during maintenance unless the fuel tank has been cleaned and purged of all flammable
liquids and vapors. Fuel burns easily and fumes are explosive. Keep battery disconnected. Failure to
observe these precautions could cause serious injury.