can i quit the cat?

[earp]

Hey guys..

I had my blazer 2000 v6 vortec 4.5 checked at the dealer as it has a problem when asking for more power (it chocked)...

The dealer told me that i must replace the cat as it is clogged. However, here out of US this part is excesively expensive. So, obviously my quick question is... can i remove the cat and just extend the exhaust?

The dealer told me that this should not be done as it exist some sensor that will cause trouble in the computer.... is that so?

If so, I would ask ? can i bypass somehoww this sensor?


is there any problem regarding the cat tha ti should consider?

Thanks everyone for your comments...

[wolfox]

I suggest taking it to another dealer that you have not set foot into. Ask about the warranty on emission control systems, and if it applies to your 2000 model year truck. If it does, ask them to replace the catalyst at their expense. They have to, it's Federal law.

Hollowing out your catalyst will trip the post catalyst sensor in your vehicle, causing it to go into "limp home mode", killing your fuel economy, and lighting up a flashing Service Engine Soon" light. *NO* muffler/mechanic shop will perform your request, it's a heavy fine and jailtime (possibly) if they perform the work for you. Your best bet and less overall expense will be to simply repair what went wrong and getting it done under warranty.

Does someone here remember how many years emission control parts are mandatorily covered for? My memory is fuzzy on the time span in years it was for...

EDIT: D-OH! I just read that you are outside of the U.S. Erm, damned if I know how that would work wherever you are now. Yes there are methods of fooling sensors. Yes, you can hollow out the cat and just put in a straight pipe for all anyone cares. I will not discuss them openly or privately for that matter. I have this big moral stumbling block that rests on my back on these matters.

[Tangent]

Or you could spend ~ $100 and have a muffler shop weld a new aftermarket cat in place... It might cost you a bit more up there but it should still be considerably cheaper than the factory part.

[earp]

Guys thankls for your advices... but..

1.- I'm not in the US so i don0't have any enviromental law or whatsoever... Altough i care about the enviroment... i think what they are charging for the part is so much exxagerated... like 10% de value of the car..
2.- Nobody sells aftermarket cat. or you buy it at the dealer or you buy it at the dealer... no choices...
3.- The another one is to bring it from the states and have someone change it ... but i'm not going to Us but in a year...and i think that the shipping cost may be highier..which is the size and the weight? any idea?
4.- if i go and buy this 100 $ cat ... is it good ? it will bring problems?

5.--- so going back to the sensors... is there any way to overrride them.. if so how to do it?

thanks...

[Tangent]

3. Size and weight - About 12" x 8" x 5" and ~20 pounds.

4. I ran a cat that I spent $100 on including installation and never had problems with it.

5. There are companies out there that sell what's effectively an O2 sensor spoofer. I don't know where or how much, but I know it's available. You'll have to install that in the harness where it used to plug into the after-cat sensor and plug the bung in the pipe where the old sensor was.

Heh heh. Bung.

[metallica21156]

i have a 95 that the cat died. if i run pipe instead of the cat will it trip the sensor?

[earp]

hey anyone has the part number? for the cat?.. maybe i can buy by the internet and have it shipped abroad...

are all the same.... i mean standard acrross blazaers? or it varies with the year?


thanks.

earp

[BlazerLT]

Originally Posted by metallica21156

i have a 95 that the cat died. if i run pipe instead of the cat will it trip the sensor?

Yes, it will trip the sensor as I said to you earlier.

The only way to get around it is to weld a straight pip in the cat's place and get an O2 sensor simulator for the sensor after the cat.

That is the only way around it without buying an aftermarket 2.25" in and out cat convertor.

You don't have to get one from the states.

And 2.25" cat will fit there and a lot of cars have that size of piping.