Skip the auto shop - Our mechanics make house calls

Q: rattling noise when engine idles. load engine noise during acceleration like glass packed muffler

asked by on

start car and sounds like a rattling sound front of car. upon acceleration loud engine noise like you would her with a souped up car with glass packed muffler.

My car has 30000 miles.
My car has an automatic transmission.

This may be related to loose exhaust parts such as exhaust mounting brackets, or potentially a bad or failing catalytic converter. As you may know, the catalytic converter has a honeycomb-like structure inside of it which helps to convert toxic exhaust gases into less harmful pollutants. When this honeycomb-like structure begins to deteriorate, the pieces tend to rattle around inside the converter housing which can cause a rattling sound as you describe. If this is the case, however, you may also notice a check engine light on. A certified YourMechanic technician can be dispatched to your location to help inspect your vehicle’s rattling noises and suggest any necessary repairs.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  • Home
  • Questions
  • rattling noise when engine idles. load engine noise during acceleration like glass packed muffler

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: Why is my car idling high

Hi There, This may be caused by a vacuum leak of some kind or potentially a dirty or faulty idle air control valve. The idle air control valve monitors the air intake as it is mixed with fuel prior to...

Q: Can i put a 3 liter from a 98 Accord into the civic?

Hello, thanks for writing in. Unfortunately, there is not enough room in the Civic's engine compartment and cradle for this swap. Also, the transmission is different for these engines. I do not think this swap would work. Lastly, the two...

Q: Rattling sound coming from beneath steering wheel

The most common cause of this would be a clicking relay or something else that is loose. This is a more uncommon issue that will require diagnosis to confirm. A qualified technician, such as one from YourMechanic, will be able...

Related articles

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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...