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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D. Check Engine Manifold Vacuum

D. Check engine manifold vacuum

NOTE:
Engine Manifold vacuum must be checked at the
- gray line disconnected from the EGR vacuum
- amplifier *

- Connect engine tester VAG 1367 for RPM indication.
- Remove gray line from EGR vacuum amplifier and attach





vacuum pump to gray line. Start engine and let idle.
- Read gauge on pump.
^ must be 15 - 18 in.HG*
^ If NOT check hoses, vacuum lines and T - pieces for leaks and ensure that the hoses are not kinked.*