FUEL INJECTION SYSTEM TROUBLESHOOTING
SERVICE MANUAL NUMBER 23
Dieseling, Run-On Symptom (Continued)
1.
Review all diagnostic procedures
within this table.
2.
If all procedures have been com-
pleted and no malfunctions have
been found, review/inspect the fol-
lowing:
•
Visual physical inspection.
7
•
Scan tool data.
•
All electrical connections within
a suspected circuit and/or sys-
tem.
Contact
3.
If a problem is found, repair as nec-
essary.
Go to OBD
System
Check
MerCruiser
Customer
Service
Was a problem found?
-
Backfire Symptom
Step
Action
Value(s)
Yes
No
Definition: Fuel ignites in the intake manifold, or in the exhaust system, making loud
popping noise.
Was the “On-Board Diagnostic” (OBD)
System Check performed?
Go to OBD
1
-
-
Go to Step 2 System Check
Was visual/physical check performed?
Go to Visual/
Physical
Check
2
Go to Step 3
1.
Check flame arrestor for proper
installation.
3
2. If a problem is found, repair as nec-
essary.
Was a problem found?
Go to OBD
System
Check
-
Go to Step 4
1.
•
Check for proper fuel pressure.
Refer to Table A-4 in “General Sys-
tem Diagnostics” section.
4
5
2.
If a problem is found, repair as nec-
essary.
Go to OBD
System
Check
Was a problem found?
-
-
Go to Step 5
Go to Step 6
Check the injector connections. If any of
the injectors are connected to an
incorrect cylinder, correct as necessary.
Was a problem found?
Go to OBD
System
Check
1.
Check fuel injectors.
•
Refer to Injector Balance Test in
“General System Diagnostics” sec-
tion.
6
2.
If a problem is found, repair as nec-
essary.
Go to OBD
System
Check
Was a problem found?
-
Go to Step 7
Index
Page 5D-30
90-861326--1 MARCH 1999
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 454 CID, Mercury MerCruiser 502 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 GM V8 GM V8 454 CID 7.4L and 502 cid 8.2L Marine Engines Service Manual Number 23 5.0 out of 5.0 based on 1 product reviews. Just need the manual. Wrote review. Can't technically review what I haven't seen yet...