Crappy mileage, dying when cold still

[OGCollard]

Need thoughts. So i adjusted my throttle plate some and that helped a little with dying at stop signs and such. However i dont think that was the cause. I did the calculations and i get 11.5 miles to the gallon...and thats mainly interstate. I still die when the engine is cold at stop lights. Crank sensor, camshaft sensor, iac are all new, tps is one year old. Thoughs on air charge temp sensor causing??

[4.3LXJ]

Worn out O2 sensors are the biggest cause of poor milage. Also you are running 31s on 3.55 gears

[OGCollard]

Thanks 4.3. Jeep came with 31's. They are running on whatever the stock gear ratio is. I have not replaced o2 sensors since i got it. Must assume they are originals. So that means they have 200,000 miles on them. Would they also assist in causing the dying at cold engine? If i recall i think there are 2 sensors on the 2000.

[4.3LXJ]

I think on the 00 there are four. But the two upper ones are the most important and the ones that will affect fuel/air ratio. And yes, they affect all rpms