Daewoo Nubira User Manual page 571

1F – 368IENGINE CONTROLS
Step
11 Replace any restricted or leaking fuel injectors.
Is the repair complete?
12 Check the fuel system pressure after a cold start or
during moderate or full throttle acceleration.
Is the fuel pressure within specifications?
13 Repair the restriction in the fuel system or replace
the faulty fuel pump.
Is the repair complete?
14
1. Check for faulty ignition wires.
2. Inspect for fouled spark plugs.
3. Check the ignition system output on each cylin-
der with a spark tester.
Is the problem found?
15 Repair or replace any ignition components as need-
ed.
Is the repair complete?
16
1. Check the generator output voltage.
2. Repair or replace the generator if the generator
output is less than the value specified.
3. Check the Exhaust Gas Recirculation (EGR)
valve operation.
Are all checks and needed repairs complete?
This Involves a steady pulsation or jerking that
follows engine speed, usually more pronounced as
engine load increases. The exhaust has a steady
spitting sound at idle or low speed.
Step
1 Were the Important Preliminary Checks performed?
2 Check the ignition system output voltage for all of the
cylinders using a spark tester.
Is spark present on all of the cylinders?
3
1. Inspect the spark plugs for excessive wear,
insulation cracks, improper gap, or heavy de-
posits.
2. Check the resistance of the ignition wires. Re-
place any ignition wires that have a resistance
greater than the value specified.
Is the problem found?
4 Repair or replace any components as needed.
Is the repair complete?
5 With the engine running, spray the ignition wires with
a fine water mist to check for arcing and shorting to
ground.
Is the problem found?
6 Replace the ignition wires.
Is the repair complete?
Action
CUTS OUT, MISSES
Action
Value(s) Yes
System OK
41–47 psi Go toStep 14
(284–325 kPa)
System OK
Go toStep 15
System OK
12–16 v System OK
Value(s) Yes
Go toStep 2
Go toStep 3
30,000 Ω
Go toStep 4
System OK
Go toStep 6
System OK
No
Go toStep 13
Go toStep 16
No
Go to"Impor-
tant Preliminary
Checks"
Go to"Ignition
System Check"
Go toStep 5
Go toStep 7
DAEWOO V–121 BL4