FUEL INJECTION SYSTEM TROUBLESHOOTING
SERVICE MANUAL NUMBER 23
Cuts Out, Misses Symptom (Continued)
1.
Check fuel injectors.
•
Refer to Injector Balance Test in
“General System Diagnostics” sec-
tion.
6
7
2.
If a problem is found, repair as nec-
essary.
Go to OBD
System
Check
Was a problem found?
-
-
Go to Step 7
Go to Step 8
1.
Checkforpropersparkateachcylin-
der.
2. If a problem is found, repair as nec-
essary.
Was a problem found?
Go to OBD
System
Check
1.
Check the spark plugs for the follow-
ing:
•
•
•
•
NOTE: If spark plugs are gas or oil
fouled, the cause of the fouling must be
determined before replacing the spark
plugs.
Insulator cracks.
Improper gap.
Burned electrodes.
Heavy deposits.
8
2.
If a problem is found, repair as nec-
essary
Go to OBD
System
Check
Was a problem found?
-
Go to Step 9
1.
Checkenginemechanicalforthefol-
lowing conditions.
•
•
•
Low compression.
Sticking or leaking valves.
Bent push rods
•
•
•
•
Worn rocker arms.
9
Broken valve springs.
Worn camshaft lobe(s).
Incorrect valve timing.
2.
If a problem is found, repair as nec-
essary.
Go to OBD
System
Check
Was a problem found?
-
-
Go to Step 10
Go to Step 11
1.
Check Intake and exhaust man-
ifold(s) for casting flash.
10
2. If a problem is found, repair as nec-
essary.
Was a problem found?
Go to OBD
System
Check
Index
Page 5D-22
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...