Miatavette

Im putting a built L33 5.3l in my miata using an Ls1 motor harness. I will be running a pretty open exhaust and dont really want to have to weld in o2 sensor bungs and buy o2's. Is there anyway I can delete them from the engine harness without having any running problems or check engine light?

jbsjunk

The rear o2's you can delete. The front 2 you need to run the engine properly.

Miatavette

So, if I wire the two front ones in and leave the back ones out wont it turn the check engine light on? I wont be running cats either so the back ones wont do any good anyways.

jbsjunk

Yup. You will most probably need to get the computer reset to pull those codes from it and anything smog related. After that, the CEL should stay off.

LS1NOVA

iTrader: (12)

You can delete them all if you really want. Have it tuned in open loop with a wideband.