1995 Chrysler Sebring Intermitent Stalling-RPM's drop off

This vehicle will intermitently stall and or rpm's drop off and it almost stalls. Is not temp. Related-will occur hot or cold does seem to happen more when cold. Has had spark plugs, wires, fuel pump, crank sensor replaced, fuel filter replaced. Once when stalled was able to check for spark before it restarted and there was no spark. Most other times it restarts right away or sometimes it does stall, RPM's will drop off at then engine seems to catch again.