Isuzu 1999 RODEO Workshop Manual page 1499

6E2–256
RODEO 6VD1 3.2L ENGINE DRIVEABILITY AND EMISSIONS
DTC P0301 — Cylinder 1 Misfire Detected (Cont'd)
Step
4 1. Visually and physically inspect the vacuum hoses
for splits, kinks, and improper connections. Also,
inspect the intake manifold for a vacuum leak.
2. If a problem is found, repair it as necessary.
Did the inspection reveal a problem?
5 1. Install a spark tester at the spark plug end of the
cylinder #1 ignition coil.
2. Crank the engine while observing the spark tester.
A crisp, blue spark should be observed.
Is adequate spark present?
6 1. Remove and visually/physically inspect the ignition
coil associated with cylinder #1. Ensure that the coil
is free of cracks and carbon tracking.
2. If a problem is found, replace the damaged ignition
coil as necessary.
Did the visual inspection reveal a problem?
7 1. Measure the ignition coil primary resistance.
2. If resistance is not within the specified value,
replace the faulty ignition coil.
Did the ignition coil require replacement?
8 Remove the cylinder #1 spark plug and visually inspect
the spark plug electrode.
Does the inspection reveal excessive fouling?
9 1. Visually inspect the spark plug insulator for cracks,
carbon tracking, or other damage.
2. If the spark plug is damaged, replace the spark plug.
Did the inspection reveal a problem?
10 1. Perform the "Injector Coil/Balance Test."
2. If any faulty injectors are found, replace them as
necessary.
Did any of the injectors require replacement?
11 1. Inspect the injector O-rings for a vacuum leak.
2. If a problem is found, repair it as necessary.
Did the inspection reveal a problem?
12 Check for an engine mechanical problem. Refer to
Engine Mechanical Diagnosis to diagnose and repair
the following conditions:
f
A faulty or incorrect camshaft
f
Leaking or sticky valves or rings
f
Excessive valve deposits
f
Loose or worn rocker arms
f
Weak valve springs
f
A leaking head gasket
Was a basic engine mechanical problem found?
Action Value(s) Yes
— Verify repair
— Go to Step 8
— Verify repair
2.6 - 2.7 kW Verify repair
Go to
Contaminatio
n Diagnosis
chart in
Engine
Mechanical
—
Diagnosis
— Verify repair
— Verify repair
— Verify repair
— Verify repair
No
Go to Step 5
Go to Step 6
Go to Step 7
Go to Step 12
Go to Step 9
Go to Step 10
Go to Step 11
Go to Step 12
Refer to
Diagnostic
Aids