Dashpot: Testing and Inspection
DASHPOT INSPECTION1. Warm up engine.
- Allow the engine to warm up to normal operating temperature.
2. Check idle speed.
Idle speed: 650 ± 50 rpm
(Transmission in neutral position)
3. Check and adjust dashpot setting speed.
- Disconnect the control cables from the throttle body.
- Turn the throttle linkage until the dashpot adjusting screw starts to separate from the push rod. Then keep the throttle linkage at that position.
- Check that the dash pot is set.
Dashpot setting speed: 2,300 ± 400 rpm
- Reconnect the control cables to the throttle body.
4. Check VTV operation.
- Maintain the engine speed at 3,500 rpm.
- Release the throttle valve, and check that the engine returns to idle in a few seconds.