isuzu Workshop Repair Guides

Isuzu Workshop Service and Repair Manuals

Pre-Adjustment Requirements|Page 841 > < Pre-Adjustment Requirements|Page 839
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Federal

NOTE: Restrictions in the idle air port cause idle speed fluctuations.  Check and clean as needed.

Before attempting to check and/or adjust idle speed, ensure that the following conditions are met:

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Engine at operating temperature.

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Throttle valve switch completely closed with idle contact on.

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If equipped with power steering, front wheels straight ahead.

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A/C "OFF" is so equipped.

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Transmission in neutral.

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Automatic transmission in either "N" or "P."

Canister Control Solenoid Connector

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Pressure control VSV electrical harness disconnected.

Canister Purge Line

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Canister purge hose disconnected and plugged.

EGR Vacuum Line

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EGR vacuum signal line disconnected at EGR valve.

Pre-Adjustment Requirements|Page 841 > < Pre-Adjustment Requirements|Page 839