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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Non-Trouble Code Procedures

MANIFOLD VACUUM CHECK





1. Start the engine and allow it to warm up until the temperature of the engine coolant reaches 80 - 95 °C (176 -203 °F).
2. Connect a tachometer.
3. Attach a tee-fitting union to the vacuum hose between the fuel pressure regulator and the intake manifold plenum, and connect a vacuum gauge.
4. Start the engine and check that idle speed is within specification. Then check the vacuum gauge reading.
Idle speed: 700 ± 100 rpm
Minimum limit: 60 kPa (18 in. Hg)