freeunit

Just installed my LT's and the extended O2 sensors they sent me are for the rear. Was wondering what will happen besides it throwing a code.

swooshonln

so your sensors (closest to the engine) arnt hooked up?

BlackMage

you need to keep your pre-cat O2 sensors hooked up, your car will run very bad if they are not. but if the post cat O2 sensors are not you will just throw a code. The post cat o2 sensors just tell you if the cats are working. The pre-cat o2 sensors are the important ones, they tell the engine whether its running lean or rich, so keep the pre cat ones installed, you can take off the post cat, but no real reason to

swooshonln

yeah and make sure you at least plug the rear o2 sensor holes up, even if you dont want to use o2 sensors, because it sounds really raspy if you leave those holes open.... trust me. You think it sounds cool for a day but then u put them back on and say "damn, my exaust sounds so full now"

freeunit

Alright cool thanks guys. So If i drive it with the holes plugged for a while which they are will the motor be fine until i get my new ones?

945LSTANG

it wont run as smooth as usual....no real problems though.

BlackMage

yea, as long as they are plugged it will run exactly the same. but with that annoying check engine light.

freeunit

alright thanks guys.