Throttle Controller
- Start engine and warm to normal operating temperature. Disconnect the No. 6 vacuum hose from throttle controller and check engine speed. See Fig 1. Engine speed should be 1700-2700 RPM on vehicles equipped with automatic transmissions, and 1400-2400 RPM on vehicles with manual transmissions.
- If engine speed is excessively high, adjust engine speed by bending tab near bottom of throttle controller rod. If engine speed does not change, connect a vacuum gauge to the No. 6 vacuum hose and check vacuum. Vacuum should be present. If not, check hose for proper connection, cracks, blockage or a disconnected hose. Replace and repair as necessary. If vacuum was present, replace throttle controller and retest.
Courtesy of AMERICAN HONDA MOTOR CO., INC.