FUEL INJECTION SYSTEM TROUBLESHOOTING
SERVICE MANUAL NUMBER 24
Dieseling, Run-On Symptom
Step
Action
Yes
No
PROCEED TO
Definition: Engine continues to run after key is turned ”OFF,” but runs very rough.
If engine runs smooth, check ignition switch and adjustment.
Was the “On-Board Diagnostic” (OBD)
System Check performed?
1
Step 2
Step 3
OBD
Was visual/physical check performed?
Visual/ Physical
Check
2
3
1.
Check for leaking fuel injectors.
Refer to Table A-4 in “General System
Diagnostics” section.
•
Was a problem found?
OBD
OBD
Step 4
Step 5
1.
Check for proper operation of Ignition Con-
trol (IC) circuit and the Knock Sensor (KS)
circuit.
4
5
Was a problem found?
1.
•
Check for obvious overheating problems:
Loose water pump belt.
•
•
•
Faulty or incorrect water pump.
Restriction in cooling system.
Faulty or incorrect thermostat.
Was a problem found?
OBD
OBD
Step 6
Step 7
1.
Check for proper operation of the EFI sys-
tem relay.
6
7
• Refer to Table A-6 in “General System
Diagnostics” section.
Was a problem found?
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:
•
Visual physical inspection.
•
•
Scan tool data.
All electrical connections within a
suspected circuit and/or system.
Contact
MerCruiser
Customer
Service
Was a problem found?
OBD
Index
Page 5F-22
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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