TM 5-3805-291-23-1
TROUBLESHOOTING WITHOUT A DIAGNOSTIC CODE - CONTINUED
0008 00
Table 1. Engine Troubleshooting - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
9. Use MSD to verify coolant temperature 1. If faulty, replace coolant temperature
16. Low Power/Poor or No
reading is correct.
sensor (WP 0077 00).
Response to Throttle -
2. If problem still exists, go to Test 10.
Continued.
1. If signal is erratic, perform Throttle
10. Use MSD to monitor the status for
Position Sensor Circuit Test (WP 0013
"Throttle Position." Verify the status
for "Throttle Position" is stable and that
00).
the engine is able to reach high idle
2. If problem still exists, go to Test 11.
speed.
11. Use MSD to perform Injector Solenoid If problem still exists, go to Test 12.
Test to determine if all injector
solenoids are being energized by the
ECM and correct as necessary. If not,
perform Injector Solenoid Circuit Test
N OT E
It is not necessary to swap the injector trim files for this temporary exchange
of two injectors. Injectors must be properly installed and adjusted for this
test.
12. Use MSD to perform Cylinder Cutout
1. If misfire problem stays with the
Test. Identify any misfiring cylinders.
suspect injector, replace the suspect
Temporarily swap suspect injector
injector and install new trim file for it
from the misfiring cylinder with an
(WP 0187 00). The other good injector
injector from a cylinder that is not
that was moved must be first be
misfiring (WP 0187 00). Repeat the
returned to its original position or its
cylinder cutout test to determine
trim file must be moved to its new
whether the misfire stays with the
location.
suspect injector or with the original
2. If the cylinder cutout test indicates the
cylinder.
misfire continues be in the same
cylinder, the suspect injector is not the
problem. Return the injectors to their
original position or move the trim files
to the new location. Investigate other
possible causes of misfire for the
problem cylinder, check valve lash
(WP 0179 00).
3. If problem still exists, go to Test 13.
13. Remove valve cover (WP 0024 00) and 1. Make any necessary repairs.
oil pan (WP 0181 00). Check for worn 2. If problem still exists, go to Test 14.
cam lobes, lifters, or push rods for the
misfiring cylinder. Check for
mechanical problems.
0008 00-19
