This is a project car and I don't know when it ran normally last. See video below. I start it up and if I give it gas, it'll stay alive. If I don't, it dies out. No codes. If I stay on the throttle for a while, I end up seeing some smoke rising from the manifold/primary cat area. Is that from a clogged cat? Could that cause it to die? Any other ideas?
https://www.youtube.com/watch?v=diWccTk ... e=youtu.be
https://www.youtube.com/watch?v=diWccTk ... e=youtu.be