Engine Cranks But Will Not Run - Daewoo Nubira Owner's Manual

Test Description
The number(s) below refer to step(s) on the diagnostic
table.
3. By performing a compression test, it can be deter-
mined if the engine has the mechanical ability to
run.
9. It is important to check for the presence of spark
from all of the ignition wires. If spark is present from
one to three of the ignition coil terminals, the crank-
shaft position (CKP) sensor is OK.
19. In checking the powertrain control module
CAUTION : Use only electrically insulated pliers when handling ignition wires with the engine running to prevent
an electrical shock.
CAUTION : Do not pinch or restrict nylon fuel lines to avoid damage that could cause a fuel leak, resulting in
possible fire or personal injury.
Important : If engine cranks but will not start, make sure fuel cut–off switch has not been tripped.
Step
1 Perform an On–Board Diagnostic (OBD II) System
Check.
Is the system check complete?
2 Crank the engine.
Does the engine start and continue to run?
3 Perform a cylinder compression test.
Is the cylinder compression for all of the cylinders at
or above the value specified?
4 Inspect the timing belt alignment.
Is the timing belt in alignment?
5 Align or replace the timing belt as needed.
Is the repair complete?
6 Repair the internal engine damage as needed.
Is the repair complete?
7 Inspect the fuel pump fuse.
Is the problem found?
8 Replace the fuse.
Is the repair complete?
9 Check for the presence of spark from all of the igni-
tion wires while cranking the engine.
Is spark present from all of the ignition wires?
10
1. Measure the resistance of the ignition wires.
2. Replace any of the ignition wire(s) with a resist-
ance above the value specified.
3. Check for the presence of spark from all of the
ignition wires.
Is spark present from all of the ignition wires?
DAEWOO V–121 BL4

ENGINE CRANKS BUT WILL NOT RUN

Engine Cranks But Will Not Run
Action
ENGINE CONTROLS 1F – 37
(PCM)/engine control module (ECM) outputs for the
electronic spark timing signal, it recommended to
use an oscilloscope to view the varying voltage sig-
nals. In measuring these outputs with a voltmeter,
intermittent errors may occur that cannot be seen
by a voltmeter.
35. This step checks for proper operation of the PCM/
ECM's control of the fuel pump circuit.
59. This step checks for a ground signal being supplied
by the PCM/ECM to operate the fuel injectors. If
there is no ground present during the cranking of
the engine, and the fuel injector wiring is OK, the
PCM/ECM is at fault.
Value(s)
Go to Step 2
System OK
689 kPa (100 Go toStep 7
psi)
Go toStep 6
Go toStep 2
Go toStep 2
Go toStep 8
Go toStep 2
Go toStep 34
30,000 W
Go toStep 2
Yes No
Go to "On–
Board Diagnos-
tic System
Check"
Go to Step 3
Go toStep 4
Go toStep 5
Go toStep 9
Go toStep 10
Go toStep 11