Isuzu 2000 Trooper Workshop Manual page 972

Engine Cranks But Will Not Run (Cont'd)
Step
14 1. Ignition "ON."
2. While the coil connectors are disconnected, touch
each coil connector's ignition feed terminal with a
grounded test light (the ignition feed wire is black
with orange tracer).
Did the test light illuminate?
15 Repair the open ignition feed circuit.
Is the action complete?
16 While the coil connectors are disconnected, touch
each connector's secondary ground terminal with a
test light to B +. (The ground wires are black.)
Did the test light illuminate at each coil connector?
17 Repair the open secondary ground circuit.
Is the action complete?
18 1. Test the fuel for contamination.
2. If a problem is found, clean the fuel system and
correct the contaminated fuel condition as
necessary. Replace the fuel filter and replace any
injectors that are not delivering fuel (see Injector
Balance Test).
Was a problem found?
19 1. Remove any ignition coil and install a spark tester at
the spark plug end of the coil.
2. Observe the tester while the engine is cranking.
Was a crisp, blue spark observed? Only one or two
sparks followed by no result is considered the same as
"No Spark."
20 Replace the ignition coil, and return to Step 19 to test
the remaining coils.
Is the action complete?
21 Repeat Step 19 for each coil. Remove only one coil at a
time, and reinstall each coil on its spark plug after
testing, but do not refasten coils with screws at this
time.
After all coils have passed the spark test, does the
engine start?
22 1. Remove the spark plugs from all cylinders.
2. Visually inspect the spark plug electrodes.
3. Replace any spark plugs with loose or missing
electrodes or cracked insulators.
Did your inspection reveal any spark plugs exhibiting
excessive fouling?
TROOPER 6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Action Value(s) Yes
Go to Step 16
—
— Verify repair
— Go to Step 18
— Verify repair
— Verify repair
Go to Step 21
—
— Verify repair
Refasten all
coils with
— their screws
Correct the
fouling
— condition
6E–103
No
Go to Step 15
—
Go to Step 17
—
Go to Step 19
Go to Step 20
—
Go to Step 22
Go to Step 23