Daewoo Nubira User Manual page 576

Step
22
1. Check the ignition system output voltage for all
of the cylinders using a spark tester.
2. Inspect the spark plugs for excessive wear,
insulation cracks, improper gap, or heavy de-
posits.
3. Inspect the ignitionwires for cracking, hard-
ness, or improper connections.
4. Replace any ignition wires with a resistance
over the value specified.
Is the problem found?
23 Repair or replace any ignition system components
as needed.
Is the repair complete?
24
1. Inspect for vacuum leaks.
2. Check for proper Positive Crankcase Ventila-
tion (PCV) operation.
3. Check the Idle Air Control (IAC) valve opera-
tion.
4. Inspect the PCM/ECM ground connections.
Is the problem found?
25 Repair or replace any components as needed.
Is the repair complete?
26
1. Check the Exhaust Gas Recirculation (EGR)
valve for proper operation.
2. Inspect the battery cables and the ground
straps for proper connections.
3. Check the generator voltage output. Repair or
replace the generator if the voltage output is
not within the value specified.
Is the problem found?
27 Repair or replace any components as needed.
Is the repair complete?
29
1. Inspect for broken engine mounts.
2. Check for proper valve timing.
3. Perform a cylinder compression test.
4. Inspect for bent pushrods, worn rocker arms,
broken or weak valve springs, and a worn cam-
shaft.
5. Perform repairs as needed.
Are all of the checks and needed repairs complete?
DAEWOO V–121 BL4
Action
ENGINE CONTROLS 1F – 373
Value(s) Yes
30,000 Ω
Go toStep 23
System OK
Go toStep 25
System OK
12–16 v Go toStep 27
System OK
System OK
No
Go toStep 24
Go toStep 26
Go toStep 28