erico2k2:

Oh I see why you are getting Confused .
Now the TWC does not mean three different cat boxes rather a single Vat box that uses three process to purify fumes coming out of car.
Reduction+Horne Combe +Oxidation all in one box to bring out Nxt COS and H2O

obekediamondfuto:


as long as u use spacers right, exactly my point!

but that is not the debate, the debate is cat delete has no impact on mpg since the post cat sensor monitors cat efficiency, but its not entirely true and I'm speaking from first hand experience that downstream sensor is used (in modern vehicles) as a checksum for the upstream sensor so if u delete cat then u have to trick the ecu by using spacers. I think u get my point.

in international forums u see experts arguing this single issue like its one hell of a deal albeit, with solid proof of live pids and data of stft and ltft. some even have a simulator for the downstream sensor and modify its values accordingly to see the effect on the trim values and surprisingly if affects FT. in some rare cases like mine its affects it up to 25%+.

well I wouldn't argue with the bosses tho, cos they have had years of experience with several brands..…. some even mistakenly pour origin in the cat to completely finish it...... but my point is, it happened to me! I installed cat for an exorbitant price and I'm not even sure if its not my cat.... but vehicle stabilized immediately... if I knew what I knew now I'd have checked for live data

kingreign:


It is a catalytic converter. Starting from 98, Toyota implemented three way catalytic converters in their California state sold cars. One on each bank and a third to further 'cleanse' the exhaust gas.

kingreign:


Hmmmm. Na three way catalytic converter

GAZZUZZ:
friendly fire

kingreign:

[s]
It is a catalytic converter. Starting from 98, Toyota implemented three way catalytic converters in their California state sold cars. One on each bank and a third to further 'cleanse' the exhaust gas[/s].

erico2k2:

So when the Cat was removed what did the mechanic replace it ?

obekediamondfuto:


it was replaced with a similar box only difference was that it was as empty as fcuuk. twas wen I got a replacement that I understood what the panel beater was talking about.



peace

erico2k2:

Yes therr is a sensor . V6 engines with two cats ha e four O2 sensors

chukel:
I think you should go back and read my comment well. Bringing in bank 2 means you are already talking V6. If you noticed I avoided using terms bank 1 bank 2 to make it easy to a non car savvy person to understand. That cat behind the radiator can be bank 1 or bank2 depending on how many cylinder the car has. My question is, is there a sensor after the cat under the car. I want to learn.

Mrcharming:
Chief, how much did you buy your cat and where? I removed the clogged cat in my Honda Accord and would like to get a replacement. Thanks.

obekediamondfuto:


bros not just the v6 the I4 also has similar config of two cats....... one just behind the radiator and another one just underneath the car, parallel to the armrest

obekediamondfuto:




wen people do cat delete I'm sure its the second cat they are removing!

erico2k2:

The third box is not a cat covert .even you diagram does not say so.however therr are 4 sensors in your diagram . Banks 1 amd 2 one is left the other right I'm waiting to see a diagram with 3 cat convert

mikebuddy:


1] The catalyst does not have any sensor, hence is does not feed data to ECU.
2] Catalyst does not control oxygen, hence it cannot even feed data to oxygen sensor, how does it even feed this data when it has nothing to do with oxygen?
3] It was simply placed there to clean the air coming from engine before it heats the environment, lets not make the duty of this catalyst cumbersome.

obekediamondfuto:




wen people do cat delete I'm sure its the second cat they are removing!

erico2k2:

That's what I meant each Cat has two sensors one before gas goes in one after gas leaves . One is heated one is not . 2 cats =4 sensors one cat =2 sensors .

erico2k2:

Well explain this.
https://www.google.co.uk/url?sa=t&source=web&cd=2&ved=0ahUKEwie1ZX4-aXYAhUOmrQKHQqtBusQwqsBCCwwAQ&url=https%3A%2F%2Fm.youtube.com%2Fwatch%3Fv%3D1e9EvrThk1Y&usg=AOvVaw3_Utoi-GVjPcSv_a2egD60

erico2k2:

U dey laugh them.you nor go help ahah

chukel:
na you d guy de laugh actually.

chukel:
you are saying a totally different thing from what he is saying. Each bank has a cat and another cat under the car. So a 4 cylinder with only 1 bank has 2 cats and a 6 cylinder with 2 banks has 3 cats. One for each bank and one under the vehicle. The one under the vehicle affects fuel consumption in no way.

erico2k2:

eheh this is actually funny, a 4 cylinder that has 4 manifolds has to cat converter ahah realy? who is producing the fumes for teh other cat converter?

chukel:
sorry, but you are making a joke of yourself.
The 2nd cat is the TWC, which is the link you posted. That TWC is under the vehicle and is strictly for environmental protection. Bro, with all due respect, I give up on you.

chukel:
Obekediamondfuto, please help me answer these questions
1. What the make, model and year of your car in question
... 03 Camry 4cyl
2. Is it a 4 cylinder?
yes it is
If yes to question 2,
3. Does it have a cat behind the radiator?
yes it does
4. Does it have another cat under the car? yes it does