Boost Control Unit: Pickup

To check pressure, engine should be at normal operating temperature, idle speed set to specifications and transmission in Neutral. Connect a tachometer to engine and a vacuum gauge to intake manifold.

Run engine under no load and note vacuum reading. Increase engine speed to 1500-2000 RPM, then quickly close the throttle. Manifold vacuum should increase to 23.6 in. Hg or more, and then gradually decrease to level noted at idle.

BOOST CONTROL UNIT OPERATING PRESSURES

Application

⁽¹⁾ Pressure (In. Hg)

Pickup

22.8-24.4

⁽¹⁾	Pressure at Sea Level.

If boost control unit operating pressure at idle is not as specified, see ADJUSTMENTS .