FUEL INJECTION SYSTEM TROUBLESHOOTING
SERVICE MANUAL NUMBER 23
Lack of Power, Sluggish or Spongy Symptom (Continued)
1.
Check for proper fuel pressure while
the condition exists.
•
Refer to Table A-4 in “General Sys-
tem Diagnostics” section.
6
2.
If a problem is found, repair as
necessary.
Go to OBD
System
Check
Was a problem found?
-
-
Go to Step 7
Go to Step 8
1.
Check for injector driver CKT’s 467
or 468 for an open.
7
8
2. If a problem is found, repair as
necessary.
Was a problem found?
Go to OBD
System
Check
1.
Check for proper operation of
Ignition Control (IC) circuit nd the
Knock Sensor (KS) circuit.
If a problem is found, repair as
necessary.
2.
Go to OBD
System
Check
Was a problem found?
-
-
Go to Step 9
1.
Check for proper ignition voltage
output.
Refer to Table A-7 in “General Sys-
tem Diagnostics” section.
If a problem is found, repair as
necessary.
•
9
2.
Go to OBD
System
Check
Was a problem found?
Go to Step 10
1.
Remove spark plugs, check for wet
plugs, cracks, wear, improper gap,
burned
electrodes
or
heavy
deposits.
•
Refer to “Distributor Ignition Sys-
tem” in “Description and System Op-
eration” section.
10
NOTE: If park plugs are gas or oil fouled,
the cause of the fouling must be deter-
mined before replacing the spark plugs.
2.
If a problem is found, repair as
necessary.
Go to OBD
System
Check
Was a problem found?
-
-
Go to Step 11
Go to Step 12
1.
Check ignition coil for cracks or
carbon tracking.
11
2. If a problem is found, repair as
necessary.
Was a problem found?
Go to OBD
System
Check
Index
Page 5D-14
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...