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