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.

A: This may be related to loose exhaust parts ...

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!

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: Ticking when accelerating

With the information that you've provided, I think you are describing an exhaust leak. It's not uncommon for a minor exhaust leak to tick, especially when cool, and then go away as it warms up. It can also increase when...

Q: The car I'm interested in buying has an engine knock

Engine knock by definition means the combustion taking place is mistimed or improperly detonated. More technically it means the explosion(s) has taken place partially or completely outside of the "envelope" (or area in the cylinder that is designed to push...

Q: Engine rattles when I I turn on my engine for the first time in the morning. It seems like it only does it when it's cold

Hello. Most likely, the noise you describe is coming from one or both of the camshaft phasers on your engine. These devices which are operated by engine oil pressure, vary camshaft timing (relative to the crankshaft), enhancing engine performance and...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.