Component Tests and General Diagnostics
The contents of this article / image reflect the changes called outin Manual update 18-137-09 dated 02/23/09.
Intake Manifold Vacuum
INSPECTION
1) Warm-up the engine.
2) Remove the collector cover.
3) Remove the intercooler.
4) Disconnect the brake booster vacuum hose from the intake manifold, and then install the vacuum gauge.
5) Install the intercooler.
6) Keep the engine at idle speed and read the vacuum gauge indication.
By observing the gauge needle movement, the internal condition of the engine can be diagnosed as described below.
Vacuum pressure (at idling, A/C OFF): Less than -68.0 kPa (-510 mmHg, -20.08 inHg)