Component Tests and General Diagnostics

Intake Manifold Vacuum

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