Pontiac Solstice misfire issue with codes P0300, P0301, and P0304, possible spark plugs or ignition coils needed on Pontiac Solstice

Some Pontiac Solstice owners report experiencing misfire issues indicated by codes P0300, P0301, and P0304, which suggest problems in specific cylinders. These codes reveal random or multiple misfires, particularly affecting cylinders 1 and 4, likely due to faulty spark plugs or ignition coils. Owners are advised to check and possibly replace these components to resolve the misfire. To diagnose the issue further, some owners have successfully switched spark plugs or ignition coils between cylinders to determine if the misfire shifts, indicating a fault with the components. Repairing the misfire may require replacing various parts, including spark plugs, ignition coils, and fuel injectors, as well as addressing potential vacuum leaks. Ignoring these misfire codes can lead to serious engine damage over time, making it essential for owners to take prompt action to maintain engine performance.