TROUBLESHOOTING WITHOUT A DIAGNOSTIC CODE - CONTINUED
Table 1. Engine Troubleshooting - Continued.
TEST OR INSPECTION
Engine Cranks but Will Not 11. Check restriction indicator on air
1. If restriction is indicated, clean or
replace air cleaner elements (WP 0032
Start - Continued.
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 12.
1. If compression is low on one or more
cylinders, replace engine (WP 0145
2. If compression is OK, go to Test 13.
13. Perform Fuel System Pressure Test
If problem still exists, go to Test 14.
If problem still exists, go to Test 15.
15. Perform Air in Fuel System Test (WP
If problem still exists, go to Test 16.
16. Check for fuel supply lines that are
1. Replace or repair any restricted fuel
lines (WP 0030 00, WP 0035 00, and
(WP 0036 00).
2. If problem still exists, go to Test 17.
If solidified fuel is found, drain and fill fuel
17. If temperature is below 32oF (0oC),
check for solidified fuel (wax) in tank. tank (WP 0166 00).
N OT E
Engine Misfires, Runs
Rough, or is Unstable.
If problem only occurs under certain conditions, test engine under those con-
ditions. Examples of certain conditions are high rpm, full load, and certain
engine operating temperatures. Troubleshooting symptoms under other con-
ditions can give misleading results.
1. Visually check fuel tank for fuel (fuel
1. Add fuel if necessary (TM 5-3805-290-
gage may be faulty).
2. If problem still exists, go to Test 2.
2. Connect MSD and check for active
1. Troubleshoot any active codes before
diagnostic codes using ET software
continuing with this procedure. Refer
to Troubleshooting With a Diagnostic
2. If problem still exists, go to Test 3.
3. Perform Fuel System Pressure Test
If problem still exists, go to Test 4.
If problem still exists, go to Test 5.