* Increased Emissions: The catalytic converter reduces harmful pollutants in the exhaust. Removing it will drastically increase emissions of carbon monoxide, hydrocarbons, and nitrogen oxides, making the car pollute significantly more.
* Engine Damage (Potential): While the engine might run, the lack of proper exhaust backpressure can lead to several problems over time, including:
* Increased engine temperature: The catalytic converter helps regulate exhaust temperature. Removing it can lead to overheating.
* Oxygen sensor issues: The oxygen sensor relies on the catalytic converter's function to accurately measure the air/fuel ratio. Incorrect readings can lead to poor fuel economy and potential engine damage.
* Pre-ignition or detonation: Higher exhaust temperatures can lead to pre-ignition or detonation, damaging pistons and other internal engine components.
* Check Engine Light: Your "Check Engine" light will almost certainly illuminate due to the missing converter and faulty oxygen sensor readings.
* Legal Ramifications: Removing a catalytic converter is illegal in most jurisdictions, and you can face significant fines if caught.
In short, while the car *might* run for a short time without a catalytic converter, the long-term consequences for both the engine and your wallet will be negative. Replacing a faulty catalytic converter is far preferable to removing it entirely.
