Slow Acceleration Test

This test will identify those conditions which are related to the engine-speed or to the vehicle-speed. Additional tests may be necessary in order to determine the exact cause of the vibration.

CAUTION: Refer to Road Test Caution in Cautions and Notes.

1. On a smooth level road, slowly accelerate up to highway speed.
2. Look for disturbances that match the customer's description.
3. Observe the following readings where the disturbance occurs:
- The vehicle speed, Kph (mph)
- The engine speed (RPM)
- The frequency (if possible)
Now perform the neutral coast-down test and the downshift test.