Mine was leaking out of the balance tube. I went to fix it on my own and made it worse. If I had more patience with and just a little more experience with the Holley I probably could have fixed it. Instead I sent it to a local place that's been around for years and has a good rep with carbs. https://www.customcarbs.com/ They completely went through it and it runs better than new. And they did a sonic cleaning on it so I didn't lose that nice Holley finish. I also gave them my spec sheet out of my manual to be sure they put it back to factory specs.