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

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EGR Valve: Testing and Inspection

Checking Condition
Engine coolant temperature: 80-95°C (176-205°F)

Procedure
1. Disconnect the vacuum hose from the throttle body EGR vacuum fitting and connect a vacuum gauge to the fitting.

2. Start the engine and check that, after raising the engine speed, vacuum raises proportionately with the rise in engine speed.

NOTE: If vacuum does not increase, it is possible that the throttle body port may be clogged and require cleaning.