Join the community and post your question. Use our Ask-A-Tech for free now! ASE experts standing by.

Forum > General Smog Check > Question

1991 Ford Ranger Has Bad Muffler

Hello I own a 1991 Ford Ranger. It has a bad muffler. The catalytic converter is good. Do I need a new muffler in order to smog check the vehicle?

Answer:

The smog inspection does not inspect or test the muffler. However if the muffler is severely damaged it may cause the smog technician problems with inserting and holding in place the exhaust emissions probe, and/or possible not allow the smog inspection to even begin. If your Ford Ranger's muffler is intact but has holes you should know this... the BAR-97 smog machine is calibrated once every three days and is designed not to allow the testing of vehicles which emit high oxygen levels. If your Ranger has holes on the muffler large enough to vacuum oxygen from the atmosphere, the smog inspection may not proceed; the smog machine will not allow the smog test to continue. It will assume there is a fault with the smog machine's calibration. posted by SmogTips Support

Related questions and answers you might find useful:

Secondary air system monitor wont set by Felipe

How Do I Get a Smog Check Waiver? by Margaret

Do I Need a Smog Check This Year? by Joy

View SmogTips.com in: Desktop / Mobile