LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Saab >> 1973 >> 95 Not Available Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Exhaust Emission Systems >> Testing >> Deceleration Valve
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Deceleration Valve

NOTE: Air cleaner must be installed.
  1. With engine idling at normal operating temperature, disconnect hose between carburetor and deceleration valve and check for vacuum passing through valve. If vacuum is present, adjusting screw on deceleration valve has to be screwed in further until valve is closed. Reconnect hose between carburetor and deceleration valve.
  2. Connect a tachometer and adjust idling speed to 900 RPM. Open throttle to obtain 3000 RPM. Release throttle and measure time required for engine speed to drop from 3000 RPM to idle. If deceleration valve is correctly adjusted, time should be between 7-8 seconds. If not between 7-8 seconds, valve must be adjusted.
scientia non olet · About LEMON Manuals