MANUALS · EMISSION CONTROL [17] · страница 31 из 46 · Открыть оригинал PDF ↗

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(1) Disconnectthevacuumhose(greenstripe) from the
throttle body, and connecta hand vacuum pump to the
vacuum hose
(2) Under the engine conditions described below, provide
vacuum by using the hand vacuum pump, and then check

When Engine is Cold-

Coolant temperature at 40*C (1049F) or below

Таблица в оригинале

Распознанный текст таблицы — требует сверки с оригиналом

Engine operating condi- tion	Applying vacuum	Result
Idling	Try applying vacuum	Vacuum leaks

When Engine is Hot-

Coolant temperature at 80*C (176'F) or higher

Таблица в оригинале

Распознанный текст таблицы — требует сверки с оригиналом

Engine operating condi-| tion	Applying vacuum	Result
Idling	30 mmHg (1,2 in Hg )	Vacuum is maintained
Changes from idling to slightly unstable	195 mmHg (7.7 in Hg	Vacuum is maintained

EGR ValveControl Vacuum Inspection

Check Condition

Engine coolant temperature: 80-95*C (176-2059F)

(1) Disconnect the vacuumhose (green) fromthe throttle
body EGRvacuum nipple andconnecthandvacuum
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
proportionatelywith the rise in engine speed:
NOTE

If there isproblem with the change in vacuum, it is
possiblethatthe throttle bodyvacuumportmaybe
clogged and require cleaning:

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