FixVault
Home › Saab › 1994 › 900 Commemorative › Repair and Diagnosis › Engine Performance › Engine Controls - Adjustments › Idle Speed & Mixture › Dashpot Adjustment

Dashpot Adjustment

  1. Warm engine to normal operating temperature. Disconnect and plug EGR hose (if equipped). Disconnect and plug vacuum advance (if equipped). Connect tachometer and measure idle speed. Adjust if necessary.
  2. Rotate throttle lever. Verify dashpot rod strikes stop at 2500-2700 RPM on turbo models, or 2400-2600 RPM on non-turbo models. If dashpot rod does not operate as specified, adjust by turning dashpot.
  3. Accelerate engine to 3000 RPM. Measure time from release of throttle until engine reaches idle speed. Deceleration time should be 3-5 seconds. If deceleration time is not 3-5 seconds, rotate dashpot inward toward stop to lengthen delay, or away from stop to shorten delay.
About FixVault