1992 Chevy Camaro idle miss when warm

I have tuned port injection 305 cid that runs & idles fine when it is cold. After the engine gets to operating temp it misses at idle only. I have put a new cap, rotor, plugs, & wires on it. I have replaced the fuel filter, & run injector cleaner thru it. Still no better. Any ideas on where to go next? I was told to check the injectors for a clicking noise when it is runing to see if they are working. They are all clicking. I am using autolight spark plugs gapped at.035. I was told that GM only likes AC plugs. I need help please! Any info would be helpfull.