FUEL INJECTION SYSTEM TROUBLESHOOTING
SERVICE MANUAL NUMBER 24
Detonation / Spark Knock Symptom (Continued)
Step
Action
Yes
No
PROCEED TO
1.
Check fuel delivery system items that can
cause an engine to run lean.
11
Was a problem found?
Step 12
1.
Check for ECT sensor being shifted in
value.
2.
Check for proper output voltage of the TP
sensor at closed throttle and wide open
throttle. Also check throttle linkage for stick-
ing, binding or worn.
12
Was a problem found?
Step 13
1.
Check for the following Engine Mechanical
problems:
•
•
•
Low compression.
Low oil level.
Excessive oil in the combustion chambers
due to valve seals leaking.
Worn or incorrect camshaft.
Proper valve timing/valve train problem.
Combustion chambers for excessive car-
bon build up.
13
•
•
•
Was a problem found?
OBD
Step 14
1.
Remove excessive carbon buildup with a
top engine cleaner.
•
Refer to instructions on top engine
cleaner can.
14
2.
Re-evaluate engine performance.
Is detonation still present?
Step 15
OBD
1.
Review all diagnostic procedures within
this table.
2.
If all procedures have been completed and
no malfunctions have been found, review/
inspect the following:
15
•
•
•
Visual/physical inspection.
Scan tool data.
All electrical connections within a sus-
pected circuit and/or system.
Contact
MerCruiser
Customer
Service
Was a problem found?
OBD
Index
Page 5F-12
90-861327--1 OCTOBER 1999
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 305 CID, Mercury MerCruiser 350 CID |
| Model Year | 1998, 1999, 2000, 2001 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
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Marine readers have rated Mercury MerCruiser Engines Service Manual Number 24 GM V-8 305 CID 350 CID 4.0 out of 4.0 based on 1 product reviews. Great performance engine.
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