For 1990-2009 cars

### Diagnostic Procedure

Rattles and noise vibrations in the exhaust system may be caused by misalignment of parts. When aligning the system, leave all bolts or nuts loose until all parts are properly aligned, then tighten, working from front to rear.

Exhaust system performance complaints, such as excessive back pressure, are noticeable by their effect on engine performance. However, other faulty vehicle components, such as emission control devices, have similar effects on engine performance and may be characterized by the same symptoms or complaints. For further information, refer to Engine Controls.