our O2 sensors

[Arctc Wolf]

I have heard that we have 2 O2 sensors, 1 before the cat and 1 after the cat, and I have also heard that we have 3 O2 sensors, 1 per manifold and 1 after the cat. which one of these descriptions is correct, or are both of these wrong? also, I hear we have narrow band O2's. Can we just switch to wideband O2's and be able to run an Air/Fuel gauge to it to measure the A/F ratio, or do we need to get a Wideband O2 kit to swap the whole Narrow band system to a wideband system so the computer works correctly? This is really confusing me and I'd really like clarification on all this. This would be for a 2001 Firebird.

[speedy-v6-camaro]

3 O2 sensors....1 in each manifold/header and one after the cat....the one after the cat is to make sure that the cat is working.

[Arctc Wolf]

Thanks. Now, do we have narrow band O2 sensors or Wideband O2 sensors? Also, if we have narrow band O2's, then can I just swap in a Wideband O2 sensor in their places and have the computer still be able to read them, or would I have to get a kit for them to work?

[BillyCobin]

My 96 has 4 O2 sensors. One in each manifold, one before the cat, and one after the cat.

[speedy-v6-camaro]

<blockquote>quote:</font><hr>Originally posted by BillyCobin:
My 96 has 4 O2 sensors. One in each manifold, one before the cat, and one after the cat.<hr></blockquote>

98+ is only 3...thats why I said 3.