Mustang GT misfire Resolved

2017 Mustang Gt with 8,000 miles on it got codes P0300 and P0308.  After changing out the spark plugs and coil packs, the codes and odd idle/hesitation at low rpms remained the same. After inspecting the intake manifold, it was found that the IMRC shaft in the driver side of the manifold was broken and the flaps remained open at all times. This part is not separate and will require a new intake manifold, or to remove the shaft from a used manifold.