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
5. Check and adjust valve lash (WP 0179
If problem still exists, go to Test 6.
11. Excessive Black Smoke -
00).
Continued.
6. Check MSD (WP 0005 00) and verify
1. If necessary, re-flash ECM (WP 0057
correct flash file is installed.
00).
2. If problem still exists, go to Test 7.
N OT E
A problem with the "FRC Fuel Limit" will only cause black smoke during
acceleration. A problem with the "FRC Fuel Limit" will not cause black
smoke during steady state operation.
7. Use MSD to monitor the status of "Fuel 1. If "Fuel Position" equals "Rated Fuel
Position" and "Rated Fuel Limit" while
Limit" and "Fuel Position" is less than
the engine is operating under full load.
"FRC Fuel Limit", the Electronic
Control Module (ECM) is providing
correct control. Go to Test 10.
2. If "Fuel Position" does not equal
"Rated Fuel Limit" and "Fuel Position"
is greater than "FRC Fuel Limit", go to
Test 8.
8. Verify that there are no active
1. Troubleshoot any active diagnostic
diagnostic codes for the intake
codes.
manifold pressure sensor.
2. If problem still exists, go to Test 9.
9. While engine is not running, monitor
1. If "Intake Manifold Pressure" is not 0
the status of "Intake Manifold
psi (0 kPa) and "Atmosperic Pressure"
Pressure" and "Atmospheric
is not between 7.25 psi (50 kPa) and
Pressure"on ET.
14.5 psi (100 kPa), replace the suspect
sensor and verify sensor reading is
correct (WP 0073 00 and WP 0084 00).
2. If "Intake Manifold Pressure" is 0 psi
(0 kPa) and "Atmosperic Pressure" is
between 7.25 psi (50 kPa) and 14.5 psi
(100 kPa), go to Test 10.
N OT E
A problem with the "FRC Fuel Limit" will only cause black smoke dur-
ing acceleration, not during steady state operation.
10. Use MSD to verify any active
1. If inlet pressure sensor codes are active,
diagnostic codes for manifold pressure
go to Test 11.
sensor.
2. If inlet pressure sensor codes are not
active, go to Test 12.
11. Check atmospheric pressure sensor for 1. Remove any debris.
dirt and debris.
2. If problem still exists, go to Test 12.
0008 00-12
