06 ram 3.7 with P0300 and P1128

Hey guys, i posted on a different ram forum and never got an answer so il try asking here. I have an 06 1500 3.7 and i keep getting the codes P0300, P0304 and P1128, not sure which direction to go in or what i should do. I have cleaned the fuel system and changed the plug and coil on cylinder 4. Your help is greatly appreciated.

- Faulty spark plug 4
- Clogged or faulty fuel injector 4
- Faulty ignition coil 4
- Fuel injector 4 harness is open or shorted
- Fuel injector 4 circuit poor electrical connection
- Ignition coil 4 harness is open or shorted
- Ignition coil 4 circuit poor electrical connection
- Insufficient cylinder 4 compression
- Incorrect fuel pressure
- Intake air leak

The P0304 code means that the cylinder 4 is misfiring or is randomly misfiring. Start by checking for intake leaks an if no leaks are found the next step is to replace the spark plugs on cylinder 4. If the problem persist more tests needs to be done to diagnose problem, see "Possible Causes"

This sounds like it is related to your ignition system. I would start there by replacing the ignition components. Also check for any air leaks.