2003 Honda Civic misfires on startup

My 2003 Honda Civic misfires at start up for about 10 seconds then corrects it self. I replaced the plugs and it worked fine for a couple of days then it started misfiring at startup again. I have been getting random codes for individual cylinder misfire. Does anyone have ideas on what it could be or what to check next?



How many miles on the plug wires? I recommend OEM plugs and wires.