Isuzu Trooper 1999 Workshop Manual page 1239

6E–438
TROOPER 6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Surges and/or Chuggles Symptom (Cont'd)
Step
18 1. Check the exhaust system for possible restriction:
f
Inspect the exhaust system for damaged or
collapsed pipes.
f
Inspect the muffler for heat distress or possible
internal failure.
f
Check for a possible plugged three-way
catalytic converter by checking the exhaust
system back pressure. Refer to Restricted
Exhaust System Check .
2. If a problem is found, repair as necessary.
Was a problem found?
19 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:
f
Visual/physical inspection
f
Tech 2 data
f
Freeze Frame data/Failure Records buffer
f
All electrical connections within a suspected
circuit and/or system.
3. If a problem is found, repair as necessary.
Was a problem found?
Action Value(s) Yes
— Verify repair
— Verify repair
No
Go to Step 19
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