Moparboy01

After this winter, I have noticed that my cat is making a lot of noise. I have a 1998 cherokee and I was thinking about just taking the cat off and running a straight pipe. Since there is an O2 sensor after the cat, if I tooke the cat off would that cause the check engine light to come on? I was thinking about doing it tomorrow but wanted to see what you guys had to say before I did anything stupid. I really dont want to spend the money on a new cat since they are expensive. Any help would be great, thanks.

fatkid89704

you can get a fairly cheap hi-flow cat from autozone or www.summitracing.com you should check them out.

steve

Moparboy01

do i need to run a cat? Thanks for the help fatkid89704.

Moparboy01

bump bump

nick_n_ii

YES you do need to run a cat it is illegal in all states not to run one.

ledangel

My 98 has no cat, it was like that when i bought it. CEL stays on and i assume it is because of the missing cat. I have heard on other vehicles running w/out a cat can burn up your valves but not sure of the truth in that. And yes it is ILLEGAL so if you live in a state that does emission tests you will get a fine at best.

COSXJFAN

Emissions tests, or not, it is illegal!! It also helps the environment, so why not run one?? Sorry if we mods are a little harsh on this subject, but it gets brought up a lot. It is harmful to or lifestyle to even talk about not running a cat, so please, put one on, it's the right thing to do!! Thanks!!

For those of you that choose not to run one, first and foremost...you should, PERIOD!! Secondly, if that doesn't sink in, please do not talk about it here, it will not be tolerated!! Any discussion about it will be deleted, thanks!!

Kyle

ledangel

http://store.summitracing.com/partde...5&autoview=sku

Thats cheaper than a ticket AND better for the environment!!

COSXJFAN

Thanks for the linky Angel!!

okcjeeper

Yep Magnaflo is what I went with on my cat, it's high flow so it doesn't restrict the exhaust but good on the enviro..

Moparboy01

Thanks guys for all the imput, I was actually thinking about just replacing the cat anyways, I slept on it and figured that was the best way to go cuz you guys are right, it is better for environment and if the whole thing about burning the valves up is true, will, I really dont want to do that. So thanks guys.

Moparboy01

Cosxjfan, your comments werent harsh, I totally understand, I dont want to do anything to hurt the environment because it will in turn hurt me down the road. Thanks for the help though

Moparboy01

just ordered the cat from Summit, again thanks to all

COSXJFAN

90xjmark

the majority of my trail toys have never had one and most that did at one point now have the o2 senor dummys so nothing runs abnormal. But I also remember when cats were over $200 for most vehicles and therefore for a play toy it was hard to justify