Ford 2003 Mustang Workshop Manual page 2935

SECTION 309-00: Exhaust System
DIAGNOSIS AND TESTING
Exhaust System
Symptom Chart
Symptom Chart
Condition
Noisy or
leaking
exhaust
Loss of
power
Possible Sources
Broken or loose
clamps, hangers or
isolators.
Punctures in the muffler
(5230).
Broken, loose or
missing exhaust
manifold fasteners or
gaskets.
Loose heated oxygen
or catalyst monitor
sensor.
Exhaust system
misalignment.
Broken or loose
catalyst internal
components.
Kinked or damaged
exhaust pipe.
Clogged three-way
catalytic converter
(5F250).
Foreign object in the
exhaust system.
2003 Mustang Workshop Manual
Action
REPAIR as necessary.
ALIGN exhaust system.
LOOSEN all fasteners joining
the exhaust system and SHAKE
the system to isolate the
concern. REPAIR as necessary.
REPAIR as necessary.