New owner questions

Yes sir, Thanks for the link. I speced out the NTK's and Walker 53461 and 16190 Ultra Converters.

Perfect! Just making sure you get the right parts. Some guys end up buying off-brand O2 sensors and they end up giving them issues. I have those Walker pre-cats myself, they work great!
 
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It surely looks like some exhaust shenanigans have taken place at some point. That cat looks universal. Here is what my secondary cat looks like on my 03 Sport.
P1030096.webp
 
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Sounds like you're on the right track replacing the cats and O2 sensors. Keep us posted on your progress.
 
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I just bought a 2003 Sahara last week, and it has some issues. First there are a couple of open electrical connectors under the hood that I don't know where they go or what they're supposed to go to. This connector is on the passenger side of the engine down close to the oil filter area.

Any tips are appreciated.

Joe

View attachment 22154 View attachment 22155


9/27/2017, I found where this plug goes, behind the engine, over the bell housing and connects to the 2/2 O2 sensor. Now, to see if having connection made will make a difference in my CEL's.
 
9/27/2017, I found where this plug goes, behind the engine, over the bell housing and connects to the 2/2 O2 sensor. Now, to see if having connection made will make a difference in my CEL's.

Let us know if it does!
 
**UPDATE**
After plugging up the O2 sensor that was disconnected, I erased the OBD codes. I've driven close to 300 miles since then and so far the CEL hasn't came back on for the O2's. So Ima call that a good stroke!

After 300 miles, I think you're in the safe now. Good to know that's all it was.

Goes to show that it usually is the simplest answer!
 

After getting the CELs for the O2 sensor corrected I did have one code pop back up, it was the P0505. So, yesterday I pulled the IAC apart and cleaned it up, erased the code and crossed my fingers. I'm using it as my daily driver for a while to flush out any more bugs so that I can have the confidence to take it on weekend trip to the Smoky Mountains.
 
After getting the CELs for the O2 sensor corrected I did have one code pop back up, it was the P0505. So, yesterday I pulled the IAC apart and cleaned it up, erased the code and crossed my fingers. I'm using it as my daily driver for a while to flush out any more bugs so that I can have the confidence to take it on weekend trip to the Smoky Mountains.
The weather is finally getting right for some back road driving in the Smokies.