1999 Chevy Camaro Still Misfiring

Hello, my car stalled one night and a P0300 random misfire code comes up. One coil pack and the ignition control module failed and were replaced thus shutting off the check engine light. A couple weeks later, the light comes back on with the same code but the engine is running smoother(still feel a miss). Ignition control module passes. Two coils had to be replaced(including the new one, third one still fine). Plugs and wires were replaced(plugs on one side were worse than other side). Random misfire code still comes up. What can be causing it?