Operation CHARM: Car repair manuals for everyone.
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

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Idle Up Control Valve: Adjustments

The Idle Boost Valves are not adjustable and are either open or closed as directed by their respective control units. If either valve fails to open or fails to completely close it should be replaced. Refer to COMPONENT TESTING PROCEDURES.