Hey I'm new here to the forum. I just bought a 2008 Jk Wrangler X 2 door with 144k miles on it for 9000 dollars when I was living in Florida for college. It came with a multitude of issues but it was a really good price for a rust free Jeep Wrangler. When I bought it it had an oil leak upper and lower pans as well as valve covers, Misfires on 3 cylinders, 2 cracked manifolds and missing manifold bolts, and a failing catalytic converter.
I fixed the misfires by changing the plugs and coil packs.
I Fixed the leaks with new gaskets
Then I decided to tackle the p0420 and p0430 codes. I started with the manifolds. I replaced them both with new gaskets, brand new bolts and manifolds. I cleared the code and after a few miles it came back. So I replaced the o2 sensors. Two front heated ones and the 2 rear regular ones. Codes came back again. Then I bought a cat off of Amazon that people had good luck with on the forums. I replaced the original with the one off Amazon. The codes came back again. There were clogs in the original cats (Which was expected due to how badly it was treated before I owned it IDK how long it was misfiring for.) There are no leaks in the exhaust that are visible or audible. I welded the cat and everything. The code just came back yesterday. I put spark plug de fowlers on the 2 second sensors to see if that would help with the code. The code came back again. I did real time data on the car to see if that would tell me anything.
I fixed the misfires by changing the plugs and coil packs.
I Fixed the leaks with new gaskets
Then I decided to tackle the p0420 and p0430 codes. I started with the manifolds. I replaced them both with new gaskets, brand new bolts and manifolds. I cleared the code and after a few miles it came back. So I replaced the o2 sensors. Two front heated ones and the 2 rear regular ones. Codes came back again. Then I bought a cat off of Amazon that people had good luck with on the forums. I replaced the original with the one off Amazon. The codes came back again. There were clogs in the original cats (Which was expected due to how badly it was treated before I owned it IDK how long it was misfiring for.) There are no leaks in the exhaust that are visible or audible. I welded the cat and everything. The code just came back yesterday. I put spark plug de fowlers on the 2 second sensors to see if that would help with the code. The code came back again. I did real time data on the car to see if that would tell me anything.
