Hello, I've always used this site to help figure out repairs for my car and I just created my profile bc I actually need some advice or help.
I have a 2010 4.0 v6 mustang with about 173k miles (alot, I know) that I just replaced the Catalytic converters on. It started running rough and the exhaust was sputtering and coming out cold. It also gave me two codes from the check engine light P0303 and P0106.

P0303- cylinder 3 misfire
P0106- Manifold absolute pressure/ BARO sensor...

Not sure if my engine is bad