Dashpot Control System
- Warm engine to normal operating temperature. Ensure idle speed is within specification. See IDLE SPEED & MIXTURE in ADJUSTMENTS - TURBO
article.
- Disconnect control cables from throttle body. Dashpot is located on throttle body, near throttle cables. See Fig 1.
- With engine idling, rotate throttle linkage on throttle body until dashpot adjusting screw starts to separate from rod on dashpot. See Fig 1. Note engine speed at this position.
- Engine speed should be 1900-2700 RPM. If engine speed is not as specified, rotate dashpot adjusting screw until specified engine speed is obtained.
- To check throttle body Vacuum Transmitting Valve (VTV) operation, operate engine at 3500 RPM. Release throttle. Ensure engine returns to proper idle speed in a few seconds. Reconnect control cables at throttle body.
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