DAEWOO NUBIRA 2004 Service Repair Manual

DAEWOO NUBIRA 2004 Service Repair Manual NUBIRA 2004 DAEWOO DAEWOO https://www.carmanualsonline.info/img/54/56879/w960_56879-0.png DAEWOO NUBIRA 2004 Service Repair Manual
Trending: key battery, intake, fuel type, airbag, odometer, OBD port, brake rotor

Page 831 of 2643

DAEWOO NUBIRA 2004  Service Repair Manual ENGINE CONTROLS  1F – 585
DAEWOO V–121 BL4
StepNo Yes Value(s) Action
71.  Perform a cylinder compression test.
2.  If the compression is low, repair the engine as
needed.
3.  Inspect for proper v

Page 832 of 2643

DAEWOO NUBIRA 2004  Service Repair Manual 1F – 586IENGINE CONTROLS
DAEWOO V–121 BL4
StepNo Yes Value(s) Action
171.  Check for electromagnetic interference.
2.  Monitor the engine rpm with a scan tool.
Does the scan tool rpm change greatl

Page 833 of 2643

DAEWOO NUBIRA 2004  Service Repair Manual ENGINE CONTROLS  1F – 587
DAEWOO V–121 BL4
POOR FUEL ECONOMY
Definition : Fuel economy, as measured by an actual road
test, is noticeably lower than expected. Also, fuel econo-
my is noticeably lo

Page 834 of 2643

DAEWOO NUBIRA 2004  Service Repair Manual 1F – 588IENGINE CONTROLS
DAEWOO V–121 BL4
ROUGH, UNSTABLE, OR INCORRECT LDLE, STALLING
Definition : The engine runs unevenly at idle. If the condi-
tion is bad enough, the vehicle may shake. Also,

Page 835 of 2643

DAEWOO NUBIRA 2004  Service Repair Manual ENGINE CONTROLS  1F – 589
DAEWOO V–121 BL4
StepNo Yes Value(s) Action
111.  Road test the vehicle at the speed of the com-
plaint.
2.  Monitor the fuel trim reading using the scan
tool.
Is the fue

Page 836 of 2643

DAEWOO NUBIRA 2004  Service Repair Manual 1F – 590IENGINE CONTROLS
DAEWOO V–121 BL4
StepNo Yes Value(s) Action
221.  Check the ignition system output voltage for all
of the cylinders using a spark tester.
2.  Inspect the spark plugs for e

Page 837 of 2643

DAEWOO NUBIRA 2004  Service Repair Manual ENGINE CONTROLS  1F – 591
DAEWOO V–121 BL4
EXCESSIVE EXHAUST EMISSIONS OR ODORS
Definition : A vehicle fails an emission test. The vehicle
has an excessive rotten egg smell.Important : Excessive o

Page 838 of 2643

DAEWOO NUBIRA 2004  Service Repair Manual 1F – 592IENGINE CONTROLS
DAEWOO V–121 BL4
StepNo Yes Value(s) Action
91.  Repair or replace any ignition system compo-
nents as needed.
2.  Perform an emission test.
Does the vehicle pass the emis

Page 839 of 2643

DAEWOO NUBIRA 2004  Service Repair Manual ENGINE CONTROLS  1F – 593
DAEWOO V–121 BL4
BACKFIRE
Definition : Fuel ignites in the intake manifold, or in the ex-
haust system, making a loud popping noise.Important : Before diagnosing the symp

Page 840 of 2643

DAEWOO NUBIRA 2004  Service Repair Manual 1F – 594IENGINE CONTROLS
DAEWOO V–121 BL4
MAINTENANCE AND REPAIR
ON–VEHICLE SERVICE
FUEL SYSTEM PRESSURE RELIEF
Procedure
CAUTION : The fuel system is under pressure. To
avoid fuel spillage and
Trending: wiring, throttle valve, spark plugs replace, change language, set clock, radio antenna, jacking