TROUBLESHOOTING WITHOUT A DIAGNOSTIC CODE - CONTINUED
Table 1. Engine Troubleshooting - Continued.
TEST OR INSPECTION
Engine Cranks but Will Not 16. Check valve lash (WP 0179 00).
1. Adjust valve lash if necessary (WP
Start - Continued.
2. If problem still exist, go to Test 17.
17. Remove the cylinder head (WP 0172
1. Replace any damage or defective parts.
00) and check for obvious signs of
2. If problem still exists, go to Test 18.
mechanical damage to cylinder block
and head including camshaft valve
mechanism, cylinders, valves, head,
18. Remove oil pan (WP 0181 00) and
If problems are found, replace engine (WP
inspect for internal problems with
and connecting rods.
N OT E
Engine Misfires, Runs
Rough, or is Unstable.
If problem only occurs under certain conditions (high rpm, full load, and
certain engine operating temperatures), test engine under those condi-
tions. Troubleshoot symptoms under other conditions can give mislead-
1. Ensure all fuel lines are tight, properly
1. Replace or repair any restricted fuel
secured, and free of restrictions.
2. If problem still exists, go to Test 2.
2. Check fuel tank for foreign objects.
1. Remove any foreign objects.
2. If problem still exists, go to Test 3.
3. If temperature is below 32°F (0°C),
1. If solidified fuel is present, drain and
check for solidified fuel.
2. If problem still exists, go to Test 4.
4. 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 5.
5. Perform Fuel System Pressure Test
If problem still exists, go to Test 6.
6. Check for correct installation of J1/P1 If problem still exists, go to Test 7.
and J2/P2 ECM connectors and fuel
injector connectors. Refer to Electrical
7. Observe the check engine lamp. Check 1. If restriction is indicated, clean or
for an air filter restriction indicator.
replace air cleaner elements (WP 0030
2. If problem still exists, go to Test 8.