TROUBLESHOOTING WITHOUT A DIAGNOSTIC CODE - CONTINUED
Table 1. Engine Troubleshooting - Continued.
TEST OR INSPECTION
14. Engine Stalls at Low RPM - 10. Use MSD to perform Cylinder Cutout
1. If misfire problem stays with the
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 first be returned
to its original position or its trim file
cylinder cutout test to determine
must be moved to its new location.
whether the misfire stays with the
2. If the cylinder cutout test indicates the
suspect injector or with the original
misfire continues to 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 11.
11. Remove valve cover (WP 0024 00) and Make any necessary repairs.
oil pan (WP 0181 00). Check for worn
cam lobes, lifters, or push rods for the
misfiring cylinder. Check for
12. Perform Electrical Connectors
Confirm good connections at ECM and
replace any wiring harnesses (WP 0195 00
thru WP 0201 00).
CAU T I ON
Do not crank engine continuously for more than 30 seconds. Allow start-
ing motor to cool for two minutes before cranking engine again. Failure
to comply with this caution may result in damage to equipment.
N OT E
If problem occurs under certain conditions, perform tests under those
conditions. Diagnosing under normal conditions could provide mislead-
1. Connect MSD (WP 0005 00) and check 1. Troubleshoot any active codes before
for active diagnostic codes.
continuing with this procedure. Refer
2. If problem still exists, go to Test 2.
2. Visually check fuel tank for fuel (fuel
1. Add fuel if necessary (TM 5-3805-291-
tank may be empty).
2. If problem still exists, go to Test 3.