Do you have to remove the distributor replace ignition coil on 1990 Toyota Camry 4 cylinder?

No, you generally do not have to remove the distributor to replace the ignition coil on a 1990 Toyota Camry 4-cylinder. The ignition coil is usually a separate component mounted near the distributor, but not integrated with it. You'll likely need to disconnect some wiring and possibly remove a few bolts or fasteners to access and replace the coil.