Can a bad catalytic converter cause a rattle?

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.

What to do if your catalytic converter is clogged?

There is an array of products and methods that claim to unclog a clogged-up catalytic converter. And while some of these approaches may work, many of them will not. The only foolproof way to address the problem of a clogged catalytic converter is to replace it with a new one.

Can a catalytic converter be repaired without replacing the ECM?

Exhaust leaks are common and can skew oxygen sensor readings without setting other DTCs. A careful search might reveal exhaust leaks that, when repaired, “restore” catalytic converter function, at least from the point of view of the ECM.

What is the sensor code for a Vortec engine?

This is on an 8.1L, V8 Chevy Vortec engine. Parts store diagnosed the Service Engine Soon fault as PO327, Knock Sensor 1, Low input. He has the part but says he is not sure if it is for Sensor 1 as there are 2 sensor circuits.

When does a knock sensor trigger a DTC?

If your knock sensor on Bank #1 is generating a low output voltage (perhaps under 0.5V), then it will trigger a P0327 DTC. This P0327 code may show up intermittently or the Service Engine light may be lit constantly. Other knock sensor related DTC codes include P0325, P0326, P0328, P0329, P0330, P0331, P0332, P0333, and P0334.

What does a bad camshaft position sensor code mean?

Once your car’s computer detects a CMP sensor failure, it will trigger the engine light and store a diagnostic trouble code (DTC) in its memory (see the table below for common camshaft position sensor trouble diagnostic codes). IV. CMP Codes and What They Mean

What causes a howling noise in the rear of a car?

Cause:Worn rear pinion bearing or worn gear set Noise:Howl without whir or rumble while accelerating at any speed (gears previously quiet) Cause:Worn gear set due to lack of lubrication or overloading Noise:Howling while accelerating over a small speed range (gears previously quiet) Cause:Worn gear set due to lack of lubrication or overloading

Why does my car AC make a rattling noise when I turn it on?

Common reasons why a car AC system makes a rattling noise is due to a failing AC compressor, worn serpentine belt, or worn out AC compressor clutch. Your car’s AC system is designed to keep you cool and comfortable when temperatures rise.

Why does my differential make noise while decelerating?

Sometimes, the noise is not differential-related, but is caused by other driveline or axle components. This guide will help you match up the noise you’re hearing with the differential or axle component making it, or at least get you in the ballpark. Noise: Howl while decelerating (gears previously quiet) Cause: Loose pinion bearingpreload

Where is the valve clatter on a Cavalier 2.2 engine?

One important change has been made in the positioning of it in the 99 upwards Cavalier. It sits on the side of the engine in a cooler spot instead of at the back of the engine. Also, valve clatter is gone because the 2.2 engine has hydraulic lifters now.

What makes a catalytic converter make a rattling noise?

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.

Why does my 440 Mopar make a rattling noise?

MY 440 mopar runs incredible at idle to 1500 rpm, but around 2000 rpm, the engine becomes overcome with loud rattling, noise, thousands of “rocks gone wild” come from the engine or transmission. It sounds like the motor is falling apart.

Why does my GM 2.2 engine make noise?

Could be the tensioner is wore out, but it would be all the time, not just when it is hot. You have to determine the location of the noise. If it is rear, lower, check the torque converter bolts. The 2.2 has a very bad reputation, both in reliability and performance.

What to do if your car muffler is rattling?

You may think that the rattling noise coming from your muffler is something that you can live with for now. However, the more you delay in correcting the problem, the more serious it can get. Fixing a rattling muffler can be as easy as tightening loose bolts or even replacing a bad or broken hanger.

Where does the rattling noise come from in a car?

Rattling noise coming from the rear of your car and right in the area where the muffler is located is often interpreted as a sign of a loose muffler.

What happens when a car converter goes bad?

An overall degradation in the engine performance is another sign. It happens because of the back pressure that the failing converter creates, affecting the engine and preventing it from running freely. It makes your car shake and the sudden burst of pressure can sometimes stall the engine too while you are driving. 4.

Why does my muffler rattle when I Turn on the car?

Brackets and bolts securing tailpipes, heat shields above catalytic converters and other components can come loose, and catalytic converters can develop internal rattles when they go bad. Cars.com’s Editorial department is your source for automotive news and reviews.

Why do waves in a muffler not register as noise?

When these waves reach the ear, they don’t register as noise simply because they cancel each other out. Inside the muffler are tubes that are specially designed to produce pressure waves that are reflected and interfere with each other; thus, canceling each other out.

Can a bad catalytic converter fail an emissions test?

Some states in the U.S. require a diagnostic check of the engine’s computer to pass an emissions test. A trouble code will be stored in the car’s computer if it has a faulty catalytic converter. Should this pop up, the car will fail the test.