Catalytic Converter or no?

Question

What actually happens when you remove the catalytic converter from a car and replace it with a straight pipe?

Answer 1

Your computer gets confused. The catalytic converter is there to reduce emissions and is mated with your vehicle computer to maximize your vehicles capabilities. Removing it also means reprogramming the computer wisest choice, or adding devices to make your computer think that the catalytic converter is there defeating the purpose of why you took the catalytic off in the first place. Keep in mind that doing this is also illegal for road use, since not having a catalytic converter increases your chances of your vehicle catching on fire. The catalytic converter also helps trap unburned gasoline and burns it before it continues down the pipes. You will notice in race cars that from time to time there are flames out of the exhaust pipe that would be what you will see if you manage to reprogram the computer and remove your catalytic converter. This is not only irresponsible, but very dangerous if you have a leak in your exhaust but because unless you spend an extra couple of thousands making sure all your gas lines and the bottom of your vehicle can withstand temperatures as high as 1100C you can easily burn your car. By just removing it and doing nothing unless you have a carburetor in your car all it would do is make lots of noise and if is a small engine not do very well, might even just start on fire since all the unburned fuel would build up on the pipe and ignite melting the pipe and setting the bottom of your car on fire. If you have a large engine might get a little performance of about 10hp something you can easily archive with a cold intake filter and reamain street legal..........

Answer 2

No Catalytic Converter

Answer 3

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RE:
Catalytic Converter or no?
What actually happens when you remove the catalytic converter from a car and replace it with a straight pipe?

Answer 4

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IOf you have 2 exhuast tip, yes. With OBD2 system you should have 4 Oxygen sensors. The two in front of the Catalytic converter detects engine combution problem. The 2 in the rear of the cat detects the catalytic converter problem. So you can detect failed catalytic converter by reading the code from the rear two oxygen sensors. However, it could also means that the rear two oxygen sensors are spitting out false error codes. So it is either your cats are failing or rear two O2 sensors are failing.

Answer 5

My suggestion is to take it back to the same shop to confirm it is not the same problem. It is possible that during the cat. conv. repair, some of the connectors to a sensor may gotten loose and caused a poor connection. However, if they claim that it's a new problem and not related to the previous repair, request a copy of the codes stored if possible on the work order. Then tell them thanks for checking it out and that you'll reschedule an appointment to have them do the repairs or something like that. But the plan is to get a second opinion from a reputable repair shop and get there feedback on the situation. Also give them the repair history so they can analyze and compare what they discovered. As far your question if your car has 2 cat. conv. I'm assuming that your engine is a V6. That means that there are 3 cylinders per cat. conv.

Answer 6

If you did that, you would be subjecting the engine to many possible problems due to the computerized engine controls used on them. The computer would try to compensate for the lack of the exhaust gases being converted and would possibly not allow the engine to run properly, if at all. With the computerized engine, all engine systems must be in harmony to function. If one or more of these systems suddenly is not in harmony, poor performance will be the first thing to happen, then possible engine damage will occur. Also, at least here in the US, it is illegal to alter the emission control system, such as removing the cat converter, so if you live in an area where smog tests are mandatory, you will not pass the test, and if they find the cat missing, you could be subjected to fines and such. If the car is not computer controlled, then there would likely be no damage, but the emissions will be much higher.

Answer 7

Do not listen to all these young kids trying to figure out this you can delete catalytic converters with no problems at all and it might actually help your gas mileage bringing your fuel consumption down and in turn lower the amount of exhaust gases coming out

Answer 8

You get a little more power, depending on the type of converter used, how many you have, how old it is, and what engine you have.

You increase air and noise pollution, and can get a real nasty fine in most areas. Your car won't pass smog.

A cop did a road side smog inspection on my car when I got pulled over for speeding. He used a infrared temp gun to make sure my converter hadn't been "punched"

Answer 9

unburned hydrocarbon emissions increase dramatically, oxides of nitrogen may actually drop[provided the e.g.r. still functions], carbon monoxide increases, sulphurdioxide decreases and particulate carbon levels rise [note there is no more long term and when combined with rain water passing through this mix becomes so volatile it will burn the paint right off of a car-
[dark blue acrylic enamal (non metalic) seems to be most affected from what ive seen]
besides high flow convertors are available and don't cost much so unless it is a race car that never see's the street there is no excuse not to have one [or two] on your car.

Answer 10

Louder vehicle that puffs smoke and stinks up the air. HP gains on a N/A motor are minimal with that CAT removed, and is usually more noticable on boosted motors.