GENERAL SYSTEM DIAGNOSTICS
SERVICE MANUAL NUMBER 23
Chart A-4 (5 of 5): Fuel System Diagnosis (Continued)
1.
2.
Ignition “OFF”.
Disconnect fuel return
line.
3.
Following manufac-
tures recommenda-
tions, connect a hose
to pressure regulator
side of return line.
Insert the other end
into an approved gas-
oline container.
34-38
(234-262)
psi
kPa
12
4.
Ignition “ON.” Note
fuel pressure within 2
seconds of ignition
“ON.”
Is fuel pre sure within
the specified value?
Go to Step 17 Go to Step 13
Check for restricted fuel
return line from fuel
pressure
water separating fuel
filter adapter.
regulator
to
13
14
Go to OBD
Was a problem found?
–
–
System Check Go to Step 16
Locate
vacuum source to fuel
pressure regulator.
and
repair
Go to OBD
System Check
Is action complete?
–
–
–
Locate and repair leaking
injector(s).
15
16
Go to OBD
System Check
Is action complete?
–
–
Replace
faulty
fuel
pressure regulator.
Go to OBD
System Check
Is action complete?
Locate
and
repair
restricted fuel return line
to water separating fuel
filter adapter.
17
18
Go to OBD
System Check
Is action complete?
–
–
–
–
Check for leaking pump
fittings or lines, inlet filter,
and low battery voltage. If
OK, replace faulty fuel
pump.
Go to OBD
System Check
Is action complete?
Index
Page 5E-76
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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