86 720 Z24 2 barrel, A/T won't idle after warm up.

Starts good, kicks down twice, no problem. We accurately changed all Vac. Hoses, fuel filter from the Electric Pump clicking away. Runs fine till the operating temp is up and normal. Five minutes into the trip.... She quits below 1300 rpm approaching a stop sign. Restart, won't idle. now it will rough idle too... Open air cleaner, look down the carburetor, the fuel mist squirts are intermittent like the missing. Is their an electrical device on the two barrel maybe shorting out or an emission device related to the temperature rise ? What Codes indicates this problem ? Appreciate the help.