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

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Cruise Control Vacuum Hose: Testing and Inspection

1. Disconnect the vacuum hose at the servo and install a vacuum gauge in the hose.
2. Start engine and observe the gauge at idle. The vacuum gauge should read at least 10 in. Hg. Shut off engine, the vacuum should continue to hold 10 in. Hg.
3. If vacuum does not meet this requirement, check and correct the following vacuum leaks:
- Vacuum lines
- Vacuum reservoir
- Servo vacuum
- Poor engine performance