Idle Speed

NOTE: Vehicles with a Gross Vehicle Weight Rating (GVWR) below 6000 lbs (8500 lbs for California), and passenger carrying vehicles with a capacity of 12 persons or less, are Light Duty Emissions Vehicles.

CURB IDLE SPEED
Light Duty
Automatic 500 rpm (California 550)
Manual 600 rpm (High Alt. 700)

Heavy Duty
Automatic 700 rpm
Manual 700 rpm

A/C ON IDLE SPEED
Manual
Federal 750 rpm
California 650 rpm
Automatic
Federal 600 rpm
California 650 rpm

FAST IDLE SPEED
Light Duty
Automatic 1600 rpm (California 1800)
Manual 1300 rpm (High Altitude 1600)

Heavy Duty
Automatic/Manual 1900 rpm

NOTE: Measured on high cam step.