Help! '86 Accord EXi stalls when idling

My 1986 Honda Accord Exi stalls when idling. After about 15 minutes of driving, it begins to shudder and eventually stall at stops. It is fine during driving but when it is left to idle at stops it stalls. I replaced the fuel pump and sparkplugs but the problem remains. It is very frustrating. Any help trying to pin point this problem would be greatly appreciated. My Accord is fuel injected. Thank you.