Dashpot Control System (2.5L)

Engine must be at normal operating temperature. Check idle speed and adjust if necessary. Remove cap, filter and separator from dashpot. See Fig 1.
Start engine. Maintain engine speed at 2500 RPM. Plug Vacuum Transmitting Valve (VTV) hole with your finger. See Fig 1.
Release throttle. Dashpot should be extended and dashpot setting RPM should be at 2000 RPM with cooling fan off. If idle speed is incorrect, adjust dashpot. See Fig 2.
To check VTV operation, run engine at dashpot testing RPM for a few seconds. Plug the VTV hole with your finger. Release throttle. Uncover plugged hole. Engine should return to idle in about one second.
Install dashpot separator, filter and cap. Install filter with coarser surface facing outward.

Fig 1: Exploded View of Dashpot (2.5L)

Fig 2: Adjusting Dashpot Idle Speed (2.5L)