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Update! Hope everyone has had a nice Christmas and has recovered from New Years! After almost 2000 miles since the engine work, no leaks, only re-torque required was the connection between the header and the rear mini cat. Engine is running smooth and quiet! There is still the persistent...

Oh no! It's on my mind completely. I will spend the next couple of months searching for a 4.0 and a 42RLE transmission in a local junk yard then spend a few months rebuilding both. I have already begun to accumulate the parts to overhaul both. Then do a swap!

185 miles at highway speeds non stop, A/C on, pushed to 90 MPH for a short duration, flawless!! Thanks again! Andrew~

All back together, running like a champ. Out on the highway easily accelerates to 80+ MPH. Will take it out for a 200+ mile run later in the week. I think there is still a hint of knocking which I think is the crank moving fore and aft due to the wear at the thrust bearing. Thank you again to...

Replacement exhaust system just arrived, 3 days early! Will install in the morning.. Full systems go!!

No spare parts!

This is the plugged catalytic convertor, and all the crap that came out of it.

This is the fitting I silver soldered to the fuel rail for the fuel pressure gauge

The best tool for cleaning parts!

Post Cleaning

teardown

The orange tab under the radiator cap is a reminder to self that coolant has been drained!

Never any 02 codes, not a one! During all of the different codes being thrown, only one time a PO175 appeared. No exhaust related codes. Cam lobes all look good. I'm thinking that the springs being compromised were not closing the valves fast enough at the higher RPM and power settings? I...

I will attempt to up-load some additional photos via the app, as via computer is a hit or miss! Sent from my iPhone using Jeepz.com mobile app

I did Terry. Ordered through Amazon, free shipping! About $552.00, from the mini cats to the tail pipe. Local exhaust shop quoted $1100.00. I found that removing the left from wheel and accessing the bolts through the inner fender was pretty easy. With all that I have just done, I think...

Good morning, Let me give a brief up-date. I'm feeling pretty good, I believe I have discovered the issue (s) and I'm on the road to recovery! After the Carbon cleaning and steam cleaning the problem persisted so I made the commitment to dive deep into the 4.0. Interesting side note, as I...

Seafoam in the fuel or oil or both?

Good morning, Are you familiar with Jeep Service Bulletin # 09-003-03, dated Aug. 1, 2003? I can't figure out how to attach a document here!! After reading it, I think it's my issue. As I don't own the $400.00 tool they reference , I will just pull the head inspect and de-carbon the valves and...