TM 5-1940-277-34
TROUBLESHOOTING PROCEDURES (Continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
4.
UNEVEN RUNNING OR FREQUENT STALLING
Step 1.
Check for air in fuel line or leaking fuel line connections.
a.
If leaks or air present refer to TM 5-1940-277-20
b.
If no air or leak in fuel line go to step 2.
Step 2.
Test for defective fuel lift pump (refer to TM 5-1940-277-20).
a.
Replace fuel lift pump (refer to TM 5-1940-277-20).
b.
If fuel lift pump all right go to step 3.
Step 3.
Test for faulty injector (refer to page 2-261).
a.
Replace injector if defective (refer to TM 5-1940-277-20).
b.
If symptoms continue go to Step 4.
Step 4.
Perform compression test to determine if valves or piston rings are defective (refer to page 2-
173).
a.
If valves are defective replace or repair as required (refer to page 2-277).
b.
If piston rings are defective report to General Support.
c.
If compression check is all right contact supervisor.
Change 1
2-7