Quick Answer: Why Is My Car Making A Rattling Noise When I Drive?

What are signs of a clogged catalytic converter?

Here are some common signs of a clogged catalytic converter:Illuminated malfunction indicator lamp.

Difficulty starting the engine and stalling.

Poor fuel economy and engine performance.

Failed emission test.

Testing for Backpressure.

Other Ways to Check Back Pressure..

What is the most likely cause of a rattling sound coming from the underside of a vehicle?

If you hear a rattling noise coming from underneath your car, this is usually a problem with the suspension or the exhaust system. … Most drivers have experienced a curious and concerning noise coming from their car.

How much does it cost to fix a rattling exhaust?

If you can hear a kind of rattling sound as you drive along, this usually means that a bracket holding part of the exhaust system in place has become loose and is no longer holding things in place properly. When caught early, this issue is pretty straight-forward and inexpensive to amend – around $40.

How does a car sound without a catalytic converter?

Listen to the exhaust. The catalytic converter helps reduce the sound in a car, just like the muffler. A car without a catalytic converter will have a loud exhaust note. … If the bulge is not there, you do not have a catalytic converter.

Why does my car rattle in the front?

The rattling noise means that something isn’t right with the way your wheels are attached to the car. For example, a lug nut may have come loose and started rattling as the wheel turned around. Have your tires and wheels checked as soon as possible.

What are the signs of a bad catalytic converter?

Among the symptoms of a bad catalytic converter are:Sluggish engine performance.Reduced acceleration.Dark exhaust smoke.The smell of sulfur or rotten eggs from the exhaust.Excessive heat under the vehicle.

Is it safe to drive with a rattling exhaust?

If the cause of a loud muffler is not a defect, it is just loud, it may not be as dangerous to drive, but you may get pulled over because of the noise. … It is possible that a broken piece of the muffler may have come off and is rattling in the exhaust system, which can cause the clunking sound.

Can low oil cause rattling?

Reason, Low Engine Oil Level: If the oil level gets too low, you can have a situation, where the oil pump sucks air into it; and the air gets pumped through the engine along with whatever oil is remaining. As a result, This can cause a rattling or ticking noise from within the engine.

What does a bad catalytic converter sound like?

Rattling noise Rattling noises are another symptom of a bad or failing catalytic converter. If a catalytic converter becomes old or damaged internally from excessively rich fuel mixtures, the catalyst coated honeycomb meshes on the inside of the converter can collapse or break apart, causing a rattle.