Isuzu C22NE Workshop Manual page 253

Step
Check for proper ignition voltage output with a spark tester
10 (Use commercially available tool).
Was a problem found?
1. Remove the spark plugs and check for gas or oil
fouling cracks, wear, improper gap, burned electrodes,
heavy deposits, or improper heat range.
11
If spark plugs are fouled, the cause of fouling must be
determined before replacing the spark plugs.
Was a problem found?
Check for a loose ignition control module ground.
12
Was a problem found?
1. Check the ignition coil secondary resistance.
2. Replace the coil if it is greater than the specified
13
resistance.
Did the coil require replacement?
Check IAC operation. Perform the procedure in the
14 diagnostic chart Diagnostic Trouble Code 35, Step 6.
Was a problem found?
Check for water or alcohol contaminated fuel.
15
Was a problem found?
Perform the procedure in Fuel System Pressure Test to
16 determine if there is a problem with fuel delivery.
Was a problem found?
Check for the following engine mechanical problems (refer
to Engine Mechanical):
• Low compression
• Leaking cylinder head gaskets
17
• Worn camshaft
• Camshaft drive belt slipped or stripped
Was a problem found?
1. Review all diagnostic procedures within this table.
2. If all procedures have been completed and no
malfunctions have been found, review/inspect the
following:
• Visual/physical inspection
18
• Scan Tool data
• All electrical connections within a suspected circuit
and/or system
Was a problem found?
Hard Start Symptom (Cont'd)
Action
DRIVEABILITY AND EMISSIONS 6E1-83
Value(s) Yes
-
Verify repair
-
Verify repair
-
Verify repair
2.5 kΩ Verify repair
-
Verify repair
-
Verify repair
-
Verify repair
-
Verify repair
-
Verify repair
No
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