Doc2006Civic

i have a 2006 civic ex coupe 5spd. My wife bought an intake for me for christmas but i think she bought the one for the SI version cause its a 3inch to a 2 1/2 tube to the TB. Once the intake was put on i started having problems with it wanting to stall out and im not sure why it is during it other than its gettting to much air and not enough fuel which is causing it to want to stall out once the motor is warm. I changed the spark plugs from iridium to double platnium. the Iridium ones were gapped 0.22-0.44 they were all gapped differently and the double platnium ones i gapped to 0.44. Anyone got any clues as to what i can do?