1998 · EMISSION CONTROL [17] · страница 12 из 14 · Открыть оригинал PDF ↗

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(3) Disconnect the three-way terminal and connect the hand
vacuum pump directly to the EGR valve

(4) Check whether or not the engine stallsor shows idling
instability whennegative pressure (Vacuum) of 30 kPa
or higher is applied during idling:

EGR Valve Control Vacuum Inspection Check Condition

Engine coolant temperature: 80 95*C

(1)Disconnect the vacuum hose (green) from the throttle
body EGR vacuum nipple and connect a hand vacuum
pump to the nipple:

(2)Start the engine and check to see that;after raising the
engine speed by racing the engine, the vacuum raises
proportionately with the rise in engine speed.
NOTE

If there is a problem with the charge in vacuum, it is
possible that the throttle body vacuum port may be
clogged and require cleaning:

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