Daewoo CIELO EURO III Manual page 221

Step
1. Relieve the fuel system pressure.
2. Install a fuel pressure gauge.
5
3. Turn the ignition ON.
Is the fuel pressure within the values specified but
not holding steady?
Inspect the fuel lines for a leak.
6
Is the problem found?
1. Replace the fuel line(s) as needed.
2. Install a fuel pressure gauge.
7
3. Turn the ignition ON.
Is the fuel pressure within the values specified and
holding steady?
1. Remove the fuel pump assembly.
2. With the fuel pump under pressure, inspect the
8
fuel pump coupling hoses for leaking.
Is the problem found?
1. Tighten or replace the fuel pump coupling hoses
as needed.
2. Install a fuel pressure gauge.
9
3. Turn the ignition ON.
Is the fuel pressure within the values specified and
holding steady?
With the fuel system under pressure, inspect the fuel
return outlet for leaking.
10
Is the problem found?
1. Replace the fuel pressure regulator.
2. Install a fuel pressure gauge.
11
3. Turn the ignition ON.
Is the fuel pressure within the values specified and
holding steady?
With the fuel system under pressure, inspect the fuel
inlet for leaking.
12
Is the problem found?
1. Repair the fuel inlet for leaking.
2. Install a fuel pressure gauge.
13
3. Turn the ignition ON.
Is the fuel pressure within the values specified and
holding steady?
1. Remove the fuel rail and the fuel injectors as an
assembly.
2. With the fuel system under pressure, inspect all
14
of the fuel injectors for leaking.
Is the problem found?
1. Replace the leaking fuel injector(s).
2. Install a fuel pressure gauge.
15
3. Turn the ignition ON.
Is the fuel pressure within the values specified and
holding steady?
DAEWOO T-154 BL2,3
Fuel System Diagnosis (Cont'd)
Action
ENGINE CONTROLS 1F – 53
Value(s) Yes
284-325 kPa
Go to Step 6
(41-47 psi)
– Go to Step 7
284-325 kPa
System OK
(41-47 psi)
–
Go to Step 9
284-325 kPa
System OK
(41-47 psi)
–
Go to Step 11
284-325 kPa
System OK
(41-47 psi)
–
Go to Step 13
284-325 kPa
System OK
(41-47 psi)
–
Go to Step 15
284-325 kPa
System OK
(41-47 psi)
No
Go to Step 17
Go to Step 8
–
Go to Step 10
–
Go to Step 12
–
Go to Step 14
–
–
–