gadawgsfan

2005 honda accord lx, 2.4 vtech, This will be long to give all information.
On November 19 passed emission with no previous issue, nov 21 will barely start. low 30's on the 21 and when I turn the key over to start it kept on and on trying to start, after several attempts it finally started, I have never had this issue in the past, it idled extremely rough for about 15 seconds and then it was back to normal. the check engine light came on so I had the codes checked and these were in there P0420,P0300,P0303,P0304. I changed the plugs and ignition coil packs and had the codes cleared. nov 22 same thing happens, you have to hold the key over for 10 to 15 seconds for it to start, then it idles ROUGH for 10 seconds or so and then it back to normal, had the codes checked again, same codes and now it also has P2646. while looking in the engine compartment I noticed that my positive battery cable was really loose, after tightening this cleared codes. nov 23 same thing hard to start ,have the codes checked again and now it has P300,P303,p304 only, still hard to start but after inital very rough idle it is back to normal until the next morning.
I am at a loss and need help
Thank you in advance for your time and consideration in helping me