GENERAL SYSTEM DIAGNOSTICS SERVICE MANUAL NUMBER 23
Page 5E-76 90-861326--1 MARCH 1999
Chart A-4 (5 of 5): Fuel System Diagnosis (Continued)
12
1. Ignition “OFF”.
2. 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.
4. Ignition “ON.” Note
fuel pressure within 2
seconds of ignition
“ON.”
Is fuel pre sure within
the specified value?
34-38 psi
(234-262) kPa
Go to
Step
17
Go to
Step 13
13
Check for restricted fuel
return line from fuel
pressure regulator to
water separating fuel
filter adapter.
Was a problem found?
–
Go to
OBD
System Check
Go to
Step
16
14
Locate and repair
vacuum source to fuel
pressure regulator.
Is action complete?
–
Go to
OBD
System Check
–
15
Locate and repair leaking
injector(s).
Is action complete?
–
Go to
OBD
System Check
–
16
Replace faulty fuel
pressure regulator.
Is action complete?
–
Go to
OBD
System Check
–
17
Locate and repair
restricted fuel return line
to water separating fuel
filter adapter.
Is action complete?
–
Go to
OBD
System Check
–
18
Check for leaking pump
fittings or lines, inlet filter,
and low battery voltage. If
OK, replace faulty fuel
pump.
Is action complete?
–
Go to
OBD
System Check
–
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