Colton_Sport

Hey everyone I have recently purchase a 1994 Jeep Cherokee Sport 2rd 5Speed.

I have fixed an exhaust leak right at the mufler trying to make it sound a little better.
But while I was under the jeep I have noticed it doesnt have a cat on it?
This good or bad? Will I lose power? Will it hurt the engine?
Unlike other vehicles they run the oxygen sensors or atleast one off of the cat. This case on my jeep it doesnt its in the downpipe. Thats why I am wondering if it really is a bad thing or not.
Thanks guys.

1991Jeep_Man

Buy a high flow cat from mudfrog, clamp it in (federal law!) and be done with it. Cats are required by law on the XJ. Not trying to sound like a jerk or anything, just sayin what really needs to be done. Plus, talking about being catless on purpose is against forum rules.

Colton_Sport

Umm like I just said I just bought the jeep haha. And I didnt know it was agains the forums sorry. They can ban me from it if theyd like. Just trying to get things straighted out here. Thanks for the advise

1991Jeep_Man

The mods only take action when people jump on and start braggin about running catless. You're good man. Everyone starts new with an XJ, and trust me you're not the first to find the cat MIA. But I would highly suggest checkin out mudfrog's vender thread about his high flow cat. I run one, and it's only like $40 shipped. Buy 3 clamps and and adapter, cut the pipe, and BAM. Sounds good, still breathes well, and is 100% legal.

Colton_Sport

Alright will do thanks alot. This may be dumb but whats mudfrog haha?

1991Jeep_Man

Mudfrog is a vendor here on the forum. Go to the Vendor section and just search high flow cat. I think their website is performance-curve.com IIRC.

COSXJFAN

All good answers, and there is no need to

excess650

I don't know when they added the 2nd O2 sensor, but the '96 and later have a 2nd downstream of the cat.

Colton_Sport

Sweet thanks a lot guys

sguiffre13

if im not mistaken the I6 needs back pressure and the cat provides that

1991Jeep_Man

All myth. Only carbed engines need backpressure or else they can run lean for too long and burn valves because the carb can't compensate for an increased rush of oxygen. MPFI systems like on the XJ sense the lean burn and add fuel to the mix.

sguiffre13

well thats good to know!

mudfrog

This is a Mudfrog