2006 T&C Touring possible exhaust manifold leak
 

We have been getting a pretty bad exhaust odor in the cabin, especially with the HVAC running. I changed out the EGR valve, as that was what the OBD reader diagnosed, didn't fix the problem. I hear a pretty good vacuum sound when I give it throttle and there feels to be an excessive amount of heat over a certain area of the front manifold. Also not getting much acceleration on the highway. Any ideas?