SERVICE MANUAL NUMBER 23
GENERAL SYSTEM DIAGNOSTICS
Chart A-4 (4 of 5): Fuel System DiagnosisContinued)
1.
Ignition “OFF” for 10
seconds.
2.
3.
Ignition “ON.”
Block fuel pressure
line between the fuel
pump and fuel rail us-
ing fuel shut-off valve
tool.
7
Does
fuel
pressure
hold?
–
Go to Step 18
Go to Step 8
1.
Ignition “OFF” for 10
seconds.
2.
3.
Ignition “ON.”
Block fuel return line
using fuel shut-off
valve tool.
8
Does
fuel
pressure
hold?
–
Go to Step 16 Go to Step 15
Go to Step 10 Go to Step 12
Is fuel pressure below
specified value?
9
34 psi (234 kPa)
Check for restricted fuel
lines. If a problem is
found, repair as neces-
sary.
10
Go to OBD
System Check
Was a problem found?
–
Go to Step 11
1.
2.
Ignition “OFF”
Block fuel return line
using fuel shut-off
valve tool.
11
38 psi (262 kPa)
3.
Ignition “ON.”
Does fuel pressure rise
above the specified
value?
Go to Step 16 Go to Step 18
Index
90-861326--1
MARCH 1999
Page 5E-75
| 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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