All work to cyl heads complete it fired up great after deleting codes got a p103 code back. Now I have to remove cats to patch frame rot can I bench check my cats if I can clean out maybe or I値l delete them I致e stupidly been using 87 gas I know my fault also I知 replacing the 4 o2 censors while I知 under there any one used the offshore 4 pack on eBay sell around 89 .00 dollars. I read they are only there to service the cats if I delete cats can I disconnect censors thanks

 

Stick with brand name O2 sensors or you'll really pay in the long run.
I prefer NTK O2 sensors (#25263 UP & #25264 DOWN) while other Disco 2 owners prefer Bosch or Walker (#350-34462 UP & #350-34188 DOWN)

 

I use Denso sensors. Check RockAuto for model numbers.

If you delete your converters, the downstream sensors will throw an emissions code. They're looking for a difference in O2 values to show that the cat is working. If you want to avoid that, you'll need to get a set of oxygen sensor spacers.

 

Ordered 4 of the spacers I知 removing flange to manifold and y pipe to main exaust remove on the bench neversieze threads install spacers fix rust behind cats and try again I知 not getting a code for sensors or cats but previous owner ran straight gas for 2 yrs so I知 deleting them also. If I need I値l try those reasonable price I see