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
7. Check the air intake and exhaust
1. Remove any blockages or restrictions
1. Engine Cannot Reach Top
RPM - Continued.
system for restrictions and/or leaks
and replace damaged air intake and
exhaust system lines or hoses (WP
0031 00 and WP 0040 00).
2. If problem still exists, go to Test 8.
8. Check all accessory equipment for
1. Repair or replace any damaged
problems that may create excessive
components.
load on the engine.
2. If problem still exists, go to Test 9.
1. If signal is erratic, perform Throttle
9. Connect MSD (WP 0005 00) and
Position Sensor Circuit Test (WP 0013
monitor the status for "Throttle
Position." Verify the status for
"Throttle Position" is stable and the
2. If problem still exists, go to Test 10.
engine is able to reach high idle speed.
10. Use MSD to monitor the status of "Fuel 1. If "Fuel Position" equals "Rated Fuel
Position", "Rated Fuel Limit", and
Limit" and "Fuel Position" is less than
"FRC Fuel Limit" on ET while the
"FRC Fuel Limit", the ECM is
engine is operating under full load.
operating correctly.
These parameters should reflect the
2. If problem still exists, go to Test 11.
following information: "Fuel Position"
equals "Related Fuel Limit" and "Fuel
Position" is less than "FRC Fuel
Limit."
11. Use MSD to monitor the status of
If readings are incorrect, replace boost
"Intake Manifold Pressure" and
pressure sensor (WP 0074 00).
"Atmospheric Pressure" for normal
operation. When the engine is not
running, the correct intake manifold
pressure is 0 psi (0 kPa). The correct
atmospheric pressure is 7.25 to 14.5 psi
(50 to 100 kPa).
Engine Cranks but Will Not 1. Visually check for fuel in tank (fuel
1. Add fuel if necessary and prime fuel
2.
tank may be empty).
system (TM 5-3805-291-10).
Start.
2. If problem still exists, go to Test 2.
2. If temperature is below 32F (0C),
1. If solidified fuel is present, drain and
check for solidified fuel (wax) in tank.
fill tank (WP 0033 00).
2. If problem still exists, go to Test 3.
3. Ensure all fuel lines are tight, properly
1. Replace, tighten, secure, or clear fuel
secured, and free of restrictions.
lines as necessary (WP 0033 00).
2. If problem still exists, go to Test 4.
4. Check fuel tank for foreign objects.
1. Remove any foreign objects.
2. If problem still exists, go to Test 5.
5. Perform Air in Fuel Test (WP 0011 00). If problem still exists, go to Test 6.
