Frequently Asked Questions About Catalytic Converters

Choosing the proper catalytic converter for your car is an increasing number of regarded as one of the most essential decisions you may make while keeping your vehicle. Whether you’re looking to maximise overall performance, minimise gasoline intake or do your bit for the environment getting the right catalytic converter for you’ll shop time, cash and keep away from the complications of failing an MoT.

Here are some frequently requested questions about catalytic converters:

Why need to I actually have a catalytic converter?

If your automobile turned into equipped after 1st August 1992 with a catalytic converter from new, you want to have one for the MoT. It wishes to be in exact working order to conform with the Government’s emissions regulation. The engine has been designed to work with a Cat and besides giving out poisonous emissions, the performance could be decreased in case your Cat isn’t always working properly. You will fail the yearly MoT if either it isn’t gift or it isn’t always in right running order.

Can I remove my Cat?

If your car changed into registered after 1st August 1992 you ought to have the Cat present and running for the MoT. Previously registered vehicles can have the Cat permanently eliminated.

Why do humans want to eliminate their Cats?

Without a Cat the engine offers extra energy and reduced petrol consumption. You might also dispose of the Cat for track / opposition / show use, for instance.

Why might my Cat fail?

Road Damage

The outside of the cat can be broken through hitting stable objects in the street. Ie, velocity bumps, huge rocks and so forth.

Plugged or infected

Plugged or contaminated catalytic converters are because of the wrong sort of gas in your vehicle. Using leaded or lead substitute gas will plug up the monolith and reason it to stop operating. A comparable component will happen if gas additives are used that are not appropriate for use with a catalytic converter.

Melted / Broken substrate

A monolith is typically damaged whilst it’s far impacted through an item or while it suffers a sudden change in temperature. If the catalytic converter suffers avenue harm (See segment on street harm) the monolith interior may be cracked due to it being crushed with the aid of the movement on the metallic can.

The use of exhaust paste earlier than the catalytic converter can cause the monolith to break. When the exhaust paste has hardened, small pellets may additionally destroy away and shoot into the catalytic converter. The monolith will steadily be destroyed by using those pellets and wreck down. The catalytic converter can also be broken with the aid of excessive engine vibration. Another possible motive of a fractured monolith is a unexpected temperature exchange. (See variety 7 in “Caring for your Catalytic Converter”)

The monolith may be melted when unburned fuel is injected into the catalytic converter. This may be caused by the auto being bump or tow began, or if the automobile’s engine requires numerous turns earlier than firing. More information may be determined on this is the section on “Overheating”.


There are many problems that could motive a catalytic converter to overheat or fail. The most common motive is unburned fuel coming into the catalytic converter. Also faulty spark plugs and leads will motive the engine to misfire and destroy the catalytic converter. It can also be damaged if the distributor timing is out.

Oxygen Sensor – An oxygen sensor collects and sends facts to the Electronic Control Unit. This is used to control the gas/air blend. If the oxygen sensor is faulty, or it has been contaminated with silicone from anti-freeze or sealant, he gasoline/air aggregate will no longer be corrected and excess fuel will enter the catalytic converter, causing it to overheat.
Fuel injection systems – If a fuel injector is leaking internally or dribbling gasoline into the engine the catalytic converter may be damaged. The excess fuel will input the exhaust system and cause it to overheat. Due to the various gas injector systems the right guide ought to constantly be consulted while seeking to diagnose a trouble.
Map Sensors – Map sensors tell the Electronic Control Unit the burden on the engine and the quantity of air coming into it. If this sensor fails it causes a wealthy condition in the engine, that could overheat the catalytic converter inflicting it to fail.
Carburettor structures – A worn or defective carburettor can cause a catalytic converter to overheat. Problems including flawed glide or air/fuel mix changes and worn metering rods can damage the catalytic converter. The choke device also needs to be operating well so the right level of gas enters the system. If an excessive amount of fuel enters the system it’s going to overheat and sooner or later fail.
Canister Purge Valve Control – This vacuum operated valve vents gas vapour from the carburettor bowl to the charcoal canister. If the vacuum is breached the charcoal canister will flood, causing the air/fuel aggregate to turn out to be very wealthy. This will purpose the catalytic converter to overheat and break down.
A catalytic converter need to no longer be considered to be a silencer even though it does have some silencing characteristics. Noise may be caused by immoderate fuel entering into the catalytic converter.

What takes place if my Cat fails?

If a catalyst fails it is able to block and the automobile will damage down.

What does my Cat do?

Catalytic converters are specialist environmentally friendly devices outfitted within the exhausts of motors which ensure that hydrocarbons are burnt off and that minimise the emission of dangerous pollution. Cars geared up with converters can use only unleaded petrol as the lead in leaded gasoline poisons the converter and irreparably damages it.

Car producers have dominated out the retrofitting of catalytic converters on older vehicles, pronouncing that it may irreparably harm the converter, as cars that have been using leaded fuel for decades have lead deposits in their engines. On becoming with a catalytic converter, those deposits should poison the Cat and damage it permanently.

Unleaded fuel, whilst burnt, produces gases together with carbon dioxide, carbon monoxide, hydrocarbons, and oxides of nitrogen, the latter 3 can be poisonous or carcinogenic. A Catalytic Converter, which is working successfully, creates a chemical response among these gases, which converts them to distinctly innocent gases. It is essential for the environment which you have your Catalytic converter checked frequently to ensure it’s far functioning well.

Catalytic converters suited to vehicles can lessen toxic emissions (e.G. Carbon Monoxide, NO2, HC) via up to 90%. Catalytic converters do not reduce CO2 emissions.

Can I in shape a Cat to a car which does not have one?

If your engine ran on leaded petrol you can not. The old deposits will poison the Cat.

How can I great care for my Cat?

There are several matters you can do to make certain your ‘cat’ has an extended and healthful existence.

When becoming the catalytic converter, don’t use exhaust paste in front of the cat. When the exhaust paste hardens it could spoil off in chunks and damage the monolith. Paste can also block the monolith.
Always use the suitable fuel on your automobile.
Never use a fuel additive with out first studying the commands to find out if it’s far appropriate for use with a catalytic converter. If doubtful, touch the producer of the additive.
Never attempt to bump or tow begin your car. This reasons unburned gasoline to be injected into the catalytic converter, which makes the monolith overheat and soften.
Never tow whatever this is too heavy on your automobile to cope with. For instance, an overloaded caravan will simply push a vehicle along while it travels downhill. This sends unburned gas into the exhaust machine and might reason the monolith to soften down.
Have your automobile often serviced in your automobile makers specs. In specific, make certain the engine is going for walks nicely. A poorly tuned engine can motive the monolith to interrupt down or turn out to be included in soot, which stops it running frequently.
Take care while driving through deep puddles, fords or parking whilst there was heavy snowfall. The catalytic converter operates at a very excessive temperature, and while it comes into direct touch with water or snow it cools down greater hastily than the monolith, and in excessive circumstances the monolith may be crushed because the metal shell contracts.
Don’t park your automobile over lengthy grass or some thing similar. As the catalytic converter operates at any such excessive temperature it is able to absolutely set the grass on fire!
Drive slowly over speed bumps or very bumpy roads to lessen the threat of the exhaust device being grounded. This should cause impact damage to the catalytic converters.

free file converter click hereĀ onlineconvertfree