How much to replace emission system?

[B1Toad]

Here's a shot of the underside from the ad, and 2 of the engine bay. Looking underneath I can't tell if that's a muffler or a cat.

 

[B1Toad]

Looks like I have answered my own question, comparing the 2000 parts list diagram with the undercarriage picture it looks like that is indeed the cat under there. I've been waiting a week to go see this Jeep and the suspense in killing me, and giving me lot's of time to think up more things!

 

[reddvltj]

Thanks, that makes a lot of sense. BTW I spent some very memorable times in Challis, my sister and BIL lived there and worked for Cypress in the 80's. Fished the Salmon River and camped all over that part of the country. Coincidentally they arrive today from Ariel, WA. for 2 weeks here in the sun.

Small world... I first moved here in 96. I've moved away a couple times but I keep coming back.

 

[reddvltj]

Looks like I have answered my own question, comparing the 2000 parts list diagram with the undercarriage picture it looks like that is indeed the cat under there. I've been waiting a week to go see this Jeep and the suspense in killing me, and giving me lot's of time to think up more things!

That's a pre 2000 and export single pipe design. (not 100% sure on year range or configurations for the exports)

Here's a screen capture from post #402 that shows the difference between 2000 model year Federal emissions and CA emissions pipe configuration between the exhaust manifold and where the primary cat bolts on. From the primary cat back is the same for both emissions classifications.

Here's a good image of the CA emissions design. The only difference is the Federal emissions does not have any O2 sensors in the exhaust manifold (although they could potentially have the bungs with plugs in them).

 

[NskLJ]

Looks like I have answered my own question, comparing the 2000 parts list diagram with the undercarriage picture it looks like that is indeed the cat under there. I've been waiting a week to go see this Jeep and the suspense in killing me, and giving me lot's of time to think up more things!
View attachment 394074

Looks like your evap system is intact, the vapor management valve is in the first picture and the carbon canister is in the second picture.

 

[Jezza]

My 2000 only had the downstream big cat. The "y" pipe had no cats.
I always bring a cheap obd2 scanner with me to look at cars. You can tell a lot by the codes or lack of codes when the owner just cleared them.

 

[B1Toad]

My 2000 only had the downstream big cat. The "y" pipe had no cats.
I always bring a cheap obd2 scanner with me to look at cars. You can tell a lot by the codes or lack of codes when the owner just cleared them.

I will bring Torque Pro, should be able to see any generic codes and live data. Are there any proprietary Mopar codes that a generic scanner can't see where it would be worth buying a Mopar capable scan tool?

 

[reddvltj]

Looks like your evap system is intact, the vapor management valve is in the first picture and the carbon canister is in the second picture.

View attachment 394118

Good catch I forgot to mention that in my last post.

 

[Jezza]

I will bring Torque Pro, should be able to see any generic codes and live data. Are there any proprietary Mopar codes that a generic scanner can't see where it would be worth buying a Mopar capable scan tool?

A generic tool will be fine. It will still show the codes, but the description may be unavailable or wrong. Nothing a quick Google search can't fix. Also, and probably more important I always check the readiness monitors. If they are all incomplete or not ready that's a good sign the codes were recently cleared. As in "quick clear it before he shows up" cleared.