Exhaust system performance complaints, such as excessive back pressure or exhaust muffler rattle, are noticeable by their effect on engine performance. Other faulty vehicle components, such as emission control devices, have similar effects on engine performance and are characterized by the same symptoms. For further information refer to Lack of Power, Sluggishness, or Sponginess in Engine Controls - 3.1L or Lack of Power, Sluggishness, or Sponginess in Engine Controls - 3.8L.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Remove the muffler. Visually inspect the muffler. Is there a restriction in the muffler? | -- | ||
2 | Replace the muffler. Refer to Muffler Replacement . Does the vehicle still have a loss of power and/or internal rattles? | -- | System OK | |
3 | Inspect the catalytic converter. Is the honeycomb broken in the catalytic converter? | -- | System OK | |
4 | Replace the catalytic converter. Refer to Catalytic Converter Replacement . Does the vehicle still have a loss of power and/or internal rattles? | -- | -- | System OK |
