Could be a sticky iac valve or put elbow cracked or a dirty maf. Mine did that a month ago so I cleaned the iac and maf now it runs great again
I think it had to do with the cold weather. Alternator tested fine. I might try to figure it out, or maybe not. New engine in a month anyways. Gonna throw my new seats in today. Pretty excited about that!! I'll update later.
Aaaaaand back to my build. Finally got the seats in. Love the outcome. Also got the entire carpet cleaned and vacuumed. Bringin this bad ***** back to life.