chevrolet Workshop Repair Guides

Chevrolet Workshop Service and Repair Manuals

Instrument Panel, Gauges and Warning Indicators > < Chart J: Vacuum Circuit Inspection. (4A-GE Engine)|Page 4489
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Vacuum Pump: Testing and Inspection
Vacuum Pump

1.

Connect a hand held vacuum pump, J23738-A, or equivalent, to actuator side of vacuum pump.

2.

Connect positive battery terminal to terminal 1 of vacuum pump.

3.

Connect negative battery lead to terminal 2.

4.

Ensure vacuum of 7.87 inches Hg or above.

5.

If results are not as indicated, replace vacuum pump.

Instrument Panel, Gauges and Warning Indicators > < Chart J: Vacuum Circuit Inspection. (4A-GE Engine)|Page 4489