Hey guys, my mileage finally went down to 12mpg after being a 17mpg and 20mpg for one tank, but then the check engine light came on.

At first it was some emissions code, then it flat out said the cat was done when it hit 12mpg.

I have been looking online, and will have some money soon. Instead of paying $140 for a cat and $60 per o2 sensor at autozone I'd like to find something that'd cheaper online that would be better or the same.

For the catalytic convertor, I was looking at Magnaflow. They have a model for around $115 that is the most expensive for the Cherokee. I'll probably go with that one.

As for the o2 sensors, I am going to replace both, but where to get them?

I found them here for $28. http://www.partstrain.com/store/deta...ar#eas-reviews

Any suggestions?

 

Here is a cheap cat and is still better than oem.......http://www.quadratec.com/products/71410_100_07.htm

 

Thanks but that isn't listed for the 6.0L XJ.

What about 02 sensors, anyone?

Wrong information^^and now I know haha

 

6.0L?! whoa! wat did i miss??

 

I'm curious about the O2 sensor as well. Has anyone had experience with the universal fit for XJs in terms of fit/quality?

 

Oh crap, I just proved that I am a novice. 6 cyclinder, 4.0L.

 

• 96-00 Jeep Cherokee (XJ) with 2.5L
• 96-00 Jeep Cherokee (XJ) with 4.0L <- thats the 4.0 you're talking about
• 96-97 Jeep Grand Cherokee (ZJ) with 4.0L
• 93-98 Jeep Grand Cherokee (ZJ) with 5.2L
• 1998 Jeep Grand Cherokee (ZJ) with 5.9L
• 99-00 Jeep Grand Cherokee (WJ) with 4.0L

Again the link that Metlic53 posted http://www.quadratec.com/products/71410_100_07.htm

 

I ended up with the Magnaflow Bought the O2 on ebay $30

 

Where did you find a $30 O2 sensor on ebay? The only ones I'm seeing are in the neighborhood of $50.

 

Ok sweet, I'll get that cat. But still o2 sensors. Do the $30 ones on the internet work just fine?

 

The cat i posted a link is for the 6 cylinder 4.0 litre. what do you mean its not?

 

This is what it says in the link..... It says right there it is made for the 4.0 Litre engine!! You read it wrong. it is for all of these cars, you just have to keep reading!
MAGNAFLOW Direct Fit Catalytic Converter

For 96-00 Jeep® Cherokee XJ with 2.5L, 4.0L & 93-98 Jeep® Grand Cherokee ZJ, WJ with 4.0L, 5.2L, 5.9L

 

http://www.quadratec.com/products/71410_100_07.htm this is the link yet again. not being mean but should make sure its not right before u say its not. lol i still have mine in the box, im going to put it on when it warms up, my old OEM cat is rattling the entire exhaust untill it gets warmed up. i bought my o2 sensor at O'reilleys

 

Whoa! i paid 75 bucks for my o2 at oreillys, i could have paid only 30??? omg...

 

What is the outlet diameter of that 4.0L cat sold through Quadratec.......2 1/4" or 2 1/2"?