I've had a dying when warm problem for a while now and still haven't figured it out. I have a 90 5.0 lx with a e303 cam,roller rockers,rebuilt 19lb injectors and flowtech shorty headers. The car was fine for a while after the mods then one day just died at a red light. The only code from the computer is 94, I've checked the smog pump,relays and valves and all are working fine. I've also changed the ignition module and pick up coil- still no help. After dying it starts right back up then dies after a minute or two. Fire and fuel look fine. Could it be the cats??? The right sides look darker than the left and I smell something when it starts acting up(but not rotten egg ish)