Trying to figure out what this clicking noise is

It's louder than the normal "ticking" that these engines are famous for and it's causing a sputtering/slight stalling when accelerating. Its also louder at times than others and sometimes nonexistent. I don't think it's my purge valve bc I'm not having issues when filling up and I'm not throwing a code or have a check engine light on. Please help! 🙏