Shift in the Demand Curve. A shift in the demand curve occurs when the whole demand curve moves to the right or left. For example, an increase in income would mean people can afford to buy more widgets even at the same price.
Once they fail they can do massive damage like I've described above. Clogged catalytic converters cause the engine to stop running all together, or at the very least you would notice that the engine would no longer rev or accelerate the vehicle (lack of power). Customer: replied 7 years ago.
Symptoms of catalytic converter problems. Converters fail in several ways so symptoms vary. Sometimes the ceramic breaks and causes a rattling noise. We most often hear this with the engine at idle speed.An impact to the exhaust can cause the brittle ceramic to fracture.ymptoms of catalytic converter problems. Converters fail in several ways so symptoms vary. Sometimes the ceramic breaks and causes a rattling noise. We most often hear this with the engine at idle speed.