bobbyray27
Jr. Member
- Joined
- Jan 12, 2007
- Messages
- 87
Ford Holley 4160 carb making loud hum/whistle sounds as if its being created by vacuum. Really loud never heard anything like it. Any thoughts of what it might be. Seems to go away when the rpm's come up off idle. All vacuum ports are capped off while trying to find the problem.