Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Component Tests and General Diagnostics

Intake Manifold Vacuum
INSPECTION
1. Warm up the engine.
2. Disconnect the brake booster vacuum hose from the 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, the 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)