Mercury MerCruiser D2.8L D-Tronic Service Manual page 658

EDI DIAGNOSIS
Troubleshooting Charts (Continued)
CONDITION
COMPRESSION
KNOCKS
EXCESSIVE
VIBRATION
Page 5E-90
POSSIBLE CAUSES
1. Air in the fuel system.
2. Poor quality
water/gasoline contaminated
fuel.
3. Engine overloaded.
4. Incorrect injection
timing.
5. Improperly
injectors.
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.
SERVICE MANUAL NUMBER 22
CORRECTION
1. Bleed the fuel system.
fuel or 2. Verify by operating from a
temporary tank with good
fuel. Clean and flush the fuel
supply tanks. Replace
fuel/water separator.
pump
3. Verify the engine load rating
is not being exceeded.
operating
4. Scan / check injection pump
timing.
5. Check and replace
inoperative Injector.
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.
90-860074--1 FEBRUARY 2002