Celica Forums General Discussion General Need advice for codes P1346 & p1349

Hello, god these codes, been through hell and back to make them go away no luck...

112,000 miles

What I have done to try and fix them:

- get timing chain checked out (was fine / is fine not stretched)
- changes both ocv's and cleaned both oil screens
- 2 oil changes
- removed k&n air filter put stock in and tried 2 maf sensors
- put new Lambada sensors in
- changed all spark plugs
- oil filter
- compression test
- checked valve clearance was off a bit (not worth adjustment costs 1k and I'd have to put a new chain on)

Engine does occasionally do a little like jump every now and no clue why.

6 speed manual
2004
2zzge

Should I just buy a brand new / refurbished engine when this one packs in?

How long will the current one last?

Think thats all, but honestly guys im stuck 🤣

Any advice appreciated!