EGR Valve Vacuum Check

EGR VALVE VACUUM CHECK

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 hand vacuum pump to the fitting.
2. Start the engine and check to see that, after increasing the engine speed, vacuum raises proportionately to engine speed.

NOTE: If there is a problem with the change in vacuum, it is possible that the throttle body port may be restricted and require cleaning.