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Home >> Chevrolet >> 1987 >> Forward Control 6.2 J, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 26 (Engine Controls - System/Component Tests - 6.5L Diesel) >> Emission Systems & Sub-Systems >> Vacuum Pump

Vacuum Pump

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Connect vacuum gauge to vacuum pump inlet (small fitting). DO NOT  plug or disconnect outlet fitting. With engine idling, vacuum should be 18 in. Hg one minute after start. If not, check for belt slippage, vacuum leaks or other obvious defects. If no defects are present, replace vacuum pump.

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