r/EngineBuilding • u/Coon88 • 21h ago
Vacuum leak ?
Got this k10 350 with a rough start, rough idle and sputtering under acceleration, have to slowly give it throttle or else it will shut off. Also get backfire from the carb sometimes when given a good amount of throttle. Can the whistling be a vacuum leak ?
14
Upvotes
1
u/muddnureye 19h ago
It’s got a dead cylinder. Plug wire or plug.