Check the complete exhaust system, nearby body areas and trunk lid for broken, damaged, missing or mispositioned parts, open seams, holes, loose connections or other deterioration which could permit exhaust fumes to seep into the trunk or passenger compartment. Dust or water in the trunk may be an indication of a problem in one of these areas. Any defects should be corrected immediately. To help insure continued integrity, the exhaust system pipe rearward of the muffler should be replaced whenever a new muffler is installed. Also perform the following checks:
After completing any repairs to the exhaust system check for possible leaks by performing the following: start the vehicle, ensure the emergency brake is on and the transmission is in
for automatic transmission or
for manual transmission, then have an assistant hold a rag up the tailpipe(s), listen for exhaust leaks. If possible carefully listen under the vehicle and, if the exhaust system is still cool, place hands around the pipes and feel for leaks. The engine may begin to stall because of excessive backpressure, which is normal and so the test should be performed quickly.
After completing any repairs to the exhaust system, lower the vehicle so the suspension is fully compressed and with the aid of an assistant rock the back end of the vehicle up and down while you listen and carefully look for any system components which might be rubbing on fuel, brake or other items such as: shock absorbers, the rear axle, driveshaft and the body or floor of the vehicle.