Dashpot Control System: 3.0L

Warm engine to normal operating temperature. Ensure idle speed is correct. See IDLE SPEED & MIXTURE in articles listed below:
- ADJUSTMENTS - 4-CYL
- ADJUSTMENTS - V6
Remove cap, filter and separator from dashpot. See Fig 1.
Start engine. Maintain engine speed at specified testing RPM. See DASHPOT TESTING SPECIFICATIONS table. Plug Vacuum Transmitting Valve (VTV) hole with your finger. See Fig 2.
Release throttle. Dashpot should be extended and dashpot setting RPM should be as specified. See DASHPOT TESTING SPECIFICATIONS table. If dashpot setting RPM is incorrect, rotate dashpot adjusting screw to obtain correct RPM. See Fig 3.
Repeat step 3) and ensure proper adjustment is obtained. To check Vacuum Transmitting Valve (VTV) operation, operate engine at dashpot testing RPM for a few seconds. Release throttle. Ensure engine returns to idle in approximately one second.
Install separator, filter and cap. Install filter with the coarse surface facing outward (away from dashpot).

DASHPOT TESTING SPECIFICATIONS

Application

Testing RPM

⁽¹⁾ Dashpot Setting RPM

T100 3.0L

2500

2000

⁽¹⁾	With electric cooling fan off (if equipped).

Fig 1: Identifying Dashpot & Components

Fig 2: Identifying Typical Vacuum Transmitting Valve

Fig 3: Adjusting Typical Dashpot