2004 DAEWOO NUBIRA Service Repair Manual

Page 825 of 2643

DAEWOO NUBIRA 2004  Service Repair Manual ENGINE CONTROLS  1F – 579
DAEWOO V–121 BL4
SURGES OR CHUGGLES
Definition : Engine power varies under steady throttle or
cruise, making it feel as if the vehicle speeds up and slows
down with no ch

Page 826 of 2643

DAEWOO NUBIRA 2004  Service Repair Manual 1F – 580IENGINE CONTROLS
DAEWOO V–121 BL4
StepNo Yes Value(s) Action
121.  Inspect the engine control module (ECM)
grounds to make sure they are clean, tight, and
in their proper locations.
2.  In

Page 827 of 2643

DAEWOO NUBIRA 2004  Service Repair Manual ENGINE CONTROLS  1F – 581
DAEWOO V–121 BL4
LACK OF POWER, SLUGGISHNESS, OR SPONGINESS
Definition : The engine delivers less than expected power. There is little or no increase in speed when the ac

Page 828 of 2643

DAEWOO NUBIRA 2004  Service Repair Manual 1F – 582IENGINE CONTROLS
DAEWOO V–121 BL4
StepNo Yes Value(s) Action
141.  Check the cylinder compression and valve tim-
ing.
2.  Inspect the camshaft for excessive wear.
Is the problem found?–G

Page 829 of 2643

DAEWOO NUBIRA 2004  Service Repair Manual ENGINE CONTROLS  1F – 583
DAEWOO V–121 BL4
HESITATION, SAG, STUMBLE
Definition : Involves a momentary lack of response as the
accelerator is pushed down. This can occur at any vehicle
speed. It is

Page 830 of 2643

DAEWOO NUBIRA 2004  Service Repair Manual 1F – 584IENGINE CONTROLS
DAEWOO V–121 BL4
StepNo Yes Value(s) Action
11Replace any restricted or leaking fuel injectors.
Is the repair complete?–System OK–
12Check the fuel system pressure aft

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