Yes.
Yes.
The catalytic converter
You can permanently damage the catalytic converter (if fitted) which can be costly to replace.
It can make the engine run so poorly that it seems like the transmission has problems.It can make the engine run so poorly that it seems like the transmission has problems.
Correct the problem. Either the engine is running poorly or you have an improperly functioning catalytic converter or air injection system.
Pre-cat, probably run poorly and may lead to damage to the catalytic converter. Post-cat, nothing.
Absolutely - a clogged air filter can cause a car to idle poorly. You could also get poor gas economy and high emissions. Also, if the computer were not able to compensate for the high fuel mixture, you could set a code and/or destroy your catalytic converter.
The affected cylinders will not fire while they have compression and fuel. The engine will run very poorly, if at all, and you can potentially damage your cat. converters via unburnt gas in the exhaust.
One of the main causes of air pollution in cities is emissions from cars and trucks. An old or poorly tuned engine will produce more pollutants than a new or well tuned engine. Old catalytic converters will allow more pollutants to leave the car and enter the air. Emission checks are meant to discover vehicles that exceed the allowable emission limits and make the owner fix the vehicle or take it off the road.
Running a 2003 Cadillac DeVille without a catalytic converter may cause the engine to perform poorly due to the lack of back pressure and altered exhaust flow. It could trigger the check engine light due to failing emissions tests and may lead to increased emissions, making the vehicle illegal to drive in many areas. Additionally, removing the catalytic converter can lead to potential damage to other components of the exhaust system and may affect fuel efficiency. Overall, while the car may run, it is not advisable to operate it without the catalytic converter.
most poorly
That is a good possibility.It also could be running lean and causing it to smell that way.If it starts running poorly or wont accelerate then you will have to replace it. Need 2 find out why IT's running Rich.
The adverb in the sentence is "seldom," as it describes the frequency with which he did poorly on tests.