Hey Scotty! Here's the issue with my 2009 Subaru Legacy 2.5. My car has been stuttering and hesitating for quite some time about 2 weeks, it idles a little weird sometimes but not all the time but it hestitates a lot especially when I step on the gas harder. Could it be the coil pack there's only one in this vehicle for four spark plug wires. I had a tune-up done two years ago with new spark plugs and wires. I ordered a new coil pack and it made things worse along with a new mass air flow sensor it didn't fix the issue. Could it be the fuel injector? I checked for codes and 4 codes came up they are P0302, P0113 P0102 and P02104.