EDI DIAGNOSIS SERVICE MANUAL NUMBER 22
Page 5E-90 90-860074--1 FEBRUARY 2002
Troubleshooting Charts (Continued)
CONDITION POSSIBLE CAUSES CORRECTION
COMPRESSION
KNOCKS
1. Air in the fuel system.
2. Poor quality fuel or
water/gasoline contaminated
fuel.
3. Engine overloaded.
4. Incorrect injection pump
timing.
5. Improperly operating
injectors.
1. Bleed the fuel system.
2. Verify by operating from a
temporary tank with good
fuel. Clean and flush the fuel
supply tanks. Replace
fuel/water separator.
3. Verify the engine load rating
is not being exceeded.
4. Scan / check injection pump
timing.
5. Check and replace
inoperative Injector.
EXCESSIVE
VIBRATION
1. Loose or broken engine
mounts.
2. Damaged or improperly
operating accessories.
3. Improperly operating
vibration damper.
4. Worn or damaged alternator
bearing.
5. Flywheel housing
misaligned.
6. Loose or broken power
component.
7. Worn or unbalanced drive
line components.
1. Replace engine mounts.
2. Check and replace the
vibrating components.
3. Inspect / replace the
vibration damper.
4. Check/replace the alternator.
5. Check/correct flywheel
alignment.
6. Inspect the crankshaft and
rods for damage that causes
an unbalance. repair/replace
as required.
7. Check/repair drive line
components.
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