Look under the car and count them.

It is illegal to remove a converter from any vehicle without replacing it with a new one.

Yes

It s illegal to remove a catalytic converter.

yes

yes

If the engine was designed to run with a cat fitted, the answer is yes, but the emissions would be out of acceptable limits. Most diesels are not cat equipped, but by the nature of being a diesel, they are injection engines.

Know that is is illegal to remove a catalytic converter without replacing it with another one.

in the paper work did it say AS-IS if not you may have a case with BAR,

Yes

Emissions on diesel engines and gas engines are much different.... diesels don't use the same type of system a gas engine does. So we have to clarify what you mean when you say "diesel catalytic converter", because 'catalytic converter' is a term exclusive to gasoline engines.. what a diesel engine has will depend on the model year and emission standards in the country it was sold in. Since I'm in the US, I'm going to use the US as an example. From 1994 onwards, diesels in the US were equipped with a Diesel Oxidation Catalyst. This would not feasibly be retrofitted to a gas engine, and, even if it could be, you would fail emissions, since the exhuast from a diesel is much more coarse than the exhaust from a gas engine, and the DOC doesn't have as tight filtering as a gas engine. From 2008 onwards, this was supplemented by a Diesel Particulate Filter, which absolutely would not work on a gas engine.. for one, gas engines are not programmed for dosing and regeneration. Furthermore, to work effectively, a DPF has to get up to temperatures of around 1200 degrees to burn off the soot load... this is done by dosing the exhaust with diesel fuel, so that it will combust inside the DPF... gasoline does not burn hot enough to achieve these temperatures. Also, to do this, there's a thing called stochiometric ratio - it pertains to the fuel/air mixture used in the engine, and the point is to optimize it for efficiency. With diesels, you have some leeway, so the engine can be run lean in order to allow the diesel-dosed exhaust to enter the DPF at the ideal stochiometric ratio to achieve that 1200 degree temperature... gas engines are not lenient in any way on this, and have strict requirements for the stochiometric ratio. Running a gas engine lean is extremely harmful to it.

From 2011 onwards, the Selective Catalytic Reduction (SCR) was included as an add-on to the aftertreatment system.... from the DPF outlet, the exhaust would travel to a decomposition tube, where it would be dosed with Diesel Exhaust Fluid (DEF - also known as AdBlue). This would break down the exhaust into less harmful elements, then it would go to the SCR, where it would be broken down further, minimizing the amount of toxic substances released by the exhaust. Since gasoline and diesel exhaust are much, much different, this would not work on a gas engine, either.

buck and boost converter is cascaded by connecting two or more converters series ....

you will smell rotten eggs all the time when u r driving around

You will get a "check engine" light. On 1996 and newer cars there is a plug near the drivers seat you can plug a cheap device into and it will tell you what "codes" the computer is giving. Google "car chip" Very interesting gizmo

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If the cat is way far gone the engine will run poorly. Stalling, sputtering, hard starts, not start at all, backfire. You may actually not even get a code other than misfire or knock sensor which are symptomatic not fundamental to the problem.

If a cat has failed it needs replaced. There is no repairing a cat.

You have spent quite a bit of money and still have the problem. Obviously the converter and the O2 sensor did not need replacing. Take the car to a professional who actually knows what they are doing, and stop throwing parts at the problem.

You have spent quite a bit of money and still have the problem. Obviously the converter and the O2 sensor did not need replacing. Take the car to a professional who actually knows what they are doing, and stop throwing parts at the problem.

if its a rotten egg smell its probably the cat if its loud volume look for a blown gasket or a hole in the pipes

By Lowering pollution

Hope this helps x

You break the law, pollute the environment, and perhaps increase your engine efficiency a bit.

Nothing good as it's illegal to remove the converter. Besides the engine will not run correctly with the converter removed. You will gain nothing.

They will not only damage it they will destroy the converter.