Well, because mine is a 2000 model with the pre-cat. The first O2 sensor is after the pre-cat, so it's sensing exhaust that has been catalyzed once already. So, first things first, I'd have to cap that O2 sensor bung and put my first one in the exhaust pipe after my first hi-flow cat.

95 Sportage w/welded and 5.89 geared dana 44's on 38.5" TSL's.- SADLY SOLD
CURRENTLY - 2000 sportage, 5.38 gears, welded diffs, 35" tires, 5.5" lift