1990 Toyota Camry Wet weather

Hi, I have a 90 Camry that doesn't want to run well in the rain. Has a tough time starting, then dies at intersections and when driving slowly, just as you go to accelerate. Sometimes will run fine. Fuel filter has been replaced, and ignition wires were replaced earlier in the year. It has been suggested that a new coil (in the distributor) may be required, but nothing definitive. Any suggestions would be very helpful, thanks!