Yeah, that's a good way to go about it. Get the obvious stuff taken care of, then you can have the codes checked if there are still problems that are trickier to track down. No big rush.

The exception would be if you start to replace something that is going to be a large project. It would suck to spend 3 hours digging halfway into the motor, then getting the codes read 2 weeks later and finding out you have to repeat the process.

Anytime you dig very deep into something, it's best to go ahead and replace any "likely suspects" in the vicinity even if they don't quite need it yet.

 

Most likely it is the plugs. Autolite plugs don't like these motors (others have their own opinion but OEM is Champion Copper and they WORK!). Replace with Champion Coppers gapped at .040 and check the plug wire.

It should sound worse with a plug disconnected. Replace the plugs with the correct plugs.

Most likely not a fuel injector, go for the plugs dude. Also go top the dealer and get some new wires, or get Mopar Performance wires, also MSD 8.5mm Red wires work great.

Replace cap and rotor with upgraded brass contacts.