I have a leak under the intake manifold and not sure what is coming from.

Hello, This is a common problem that I have heard of in the 2014 models, but not a 2013. The oil filter housing has a tendency to crack, allowing oil to run into the galley, below the plenum. Also, there are coolant lines there that were even notorious on the old 3.5l engine for rupturing or slow leakage at connectors. In either case, you likely will have to remove the plenum, and the intake manifold, replace the line or fittings, and replace the oil filter housing. After 4 years of use, check the ownders manual for the interval for changing engine coolant, transmission fluid, and engine oil while you are there. If they are due, it is a good time to knock those out while you are already changing the filter housing (if needed). If you need further assistance, let me know, otherwise, here is a list of certified shops in your area that can diagnose and repair your vehicle: http://repairpal.com/dodge-within-10-miles-of-austin-texas-78753