Basic Idle Speed

Ground Red/White wire in 2-wire test lead. See Fig 1 . Test lead is located on right side of master cylinder. Grounding wire will set air valve wide open.

Fig 1: Adjusting Basic Idle Speed
Courtesy of VOLVO CARS OF NORTH AMERICA.
Use air bleed knob located under throttle body to set basic idle speed. See IDLE SPEED & CO LEVEL table. Disconnect ground wire from test lead. Engine speed should increase.

IDLE SPEED & CO LEVEL

Application

Idle RPM

% CO Level

940 GLE

850

⁽¹⁾ 0.6

Turbo Models

750

⁽¹⁾ 0.6

All Others

775

⁽¹⁾ 0.6

⁽¹⁾	O2 sensor disconnected. CO level is measured before catalytic converter.

NOTE: Mixture adjustment is not a normal tune-up procedure. It should not be performed unless mixture control unit is replaced or vehicle fails emissions testing.