Q: I have a 1998 Caddy DeVille, has original muffler and catalytic converter. had to be tweaked to pass CA smog, replace both?

asked by on

I own a 1998 Caddy Deville, it still has original muffler and catalytic converter. It had to be "tweaked" to pass CA Smog last year. Should I replace muffler and converter? Thanks, Pete

My car has 214000 miles.
My car has an automatic transmission.

Hey Pete, thanks for writing in. The replacements have more to do with what is actually wrong with the vehicle. If they have been modified illegally, then the answer is an automatic yes. Not only does it cause issues with the legalities behind California exhaust standards, but the changes may cause issues with the way the vehicle operates. The catalytic converter does most of the work when it comes to emission standards, and it will need to be focused on first. The muffler does more for sound regulation, but there are laws regarding them as well. Again, start by replacing the catalytic converter first. Replace the muffler if it is damaged, rusted out, or illegal. If you need help making the repairs and getting the car to pass SMOG testing, contact our service department to schedule an appointment.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. I have a 1998 Caddy DeVille, has original muffler and catalytic converter. had to be tweaked to pass CA smog, replace both?

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: My car sounds like a go cart upon acceleration and the Check Engine Light is on - possible problem with the catalytic converter

As you may know, the catalytic converter converts toxic unburnt fuel gases into less harmful gases that are released into the environment. When this is not working properly, these gases tend to back up in the exhaust system of your...

Q: Whats a Car's Muffler Do?

The purpose of a car’s muffler is to quieten the sound of the exhaust after the combustion process. A muffler’s ability to quiet the engine noise relies on several tubes that are located inside the muffler itself. These tubes have...

Q: Power steering problem - 1999 Lincoln Continental

Your power steering system should not have anything to do with the coil springs or air shocks as these are entirely different systems. This may suggest your power steering pump may be failing or potentially your rack and pinion system...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...