70MM Throttle Body issues

Let me start by saying I have an AEM cold air intake and an HKS full exhaust. I thought that added a bigger throttle body would make sense. After I installed the throttle body and started my car, it ran like CRAP. It still does actually, but I'm in the army and in Iraq so I didn't get a chance to get it fixed. My car burns through fuel a TON faster and it smells like it's running really rich. It act's like it want's to stall out, but it doesn't stall. I'm not really sure what would cause my car to run like this. Seems like a throttle body wouldn't make it so complicated. need some help here. thanks.