TM 5-3805-290-23-1
TROUBLESHOOTING WITHOUT A DIAGNOSTIC CODE - CONTINUED
0008 00
Table 1. Engine Troubleshooting - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
5. Perform Air in Fuel System Test (WP
If problem still exists, go to Test 6.
3.
Engine Misfires, Runs
Rough, or is Unstable -
Continued.
6. Check for fuel supply lines that are
1. Replace or repair any restricted fuel
restricted.
lines (WP 0030 00, WP 0035 00, and
WP 0038 00) and replace fuel filters
(WP 0036 00).
2. If problem still exists, go to Test 7.
1. If solidified fuel is found, drain and fill
7. If temperature is below 32oF (0oC),
fuel tank (WP 0166 00).
check for solidified fuel (wax) in tank.
2. If problem still exists, go to Test 8.
8. Check restriction indicator on air
1. If restriction is indicated, clean or
cleaner (TM 5-3805-290-10).
replace air cleaner elements (WP 0032
00), remove any blockages or
restrictions, and replace damaged air
inlet and exhaust system lines or hoses
(WP 0033 00 and WP 0041 00).
2. If problem still exists, go to Test 9.
9. Perform Cylinder Balance Test (WP
1. If there is not a reduction in engine
speed when every line is loosened,
determine if nozzle(s) are leaking and
replace leaky nozzle(s) (WP 0163 00).
2. If problem still exists, go to Test 10.
10. Check valve lash (WP 0155 00).
1. If necessary, reset valve lash.
2. If problem still exists, go to Test 11.
11. Perform Compression Test (WP 0010
1. If compression is low on one or more
cylinders, replace engine (WP 0145
00).
2. If compression is OK, go to Test 12.
12. Check fuel injector nozzle(s) (WP
1. If damaged, replace fuel injection
0163 00).
nozzle(s).
2. If problem still exists, go to Test 13.
13. Ensure engine speed/timing sensor is
1. Install speed/timing sensor and harness
installed correctly on cylinder block
correctly.
(WP 0067 00) and harness is correctly
2. If problem still exists, go to Test 14.
connected (WP 0170 00).
14. Check wiring harness to ensure cables
1. Reinstall harness correctly.
to sensors are not too tight (WP 0170
2. If problem still exists, go to Test 15.
00). This could cause an intermittent
problem due to vibration.
15. Perform Engine Speed/Timing Circuit
If problem still exists, go to Test 16.
Test (WP 0013 00).
0008 00-5
