Component Tests and General Diagnostics

Intake Manifold Vacuum

INSPECTION
1) Warm up the engine.
2) Disconnect the brake vacuum hose from intake manifold, and then install the vacuum gauge.
3) Keep the engine at idle speed and read the vacuum gauge indication.
By observing the gauge needle movement, internal condition of the engine can be diagnosed as described below.





Vacuum pressure (at idling, [A/C "OFF"): Less than -60.0 kPa (-450 mmHg, -17.72 inHg)