Autolite 4100 Carburetor Installation Hot Idle Compensator

Here's a hot-idle compensator, which consists of a bimetallic strip consisting of two dissimilar metals that expand and contract at different rates based on temperature. As expansion occurs with heat, bimetallic strips unseat the valve, causing a minute vacuum leak and faster idle, which helps cooling. If your engine is running rough, it could be a faulty hot-idle compensator. View Related Article