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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Compression Check: Testing and Inspection


Compression, checking

Test conditions
^ Engine oil temperature at least 30°C
^ Battery fully charged

^ Disconnect harness connectors from all 6 fuel injectors.
^ Disconnect 5-pin harness connector from power output stage of ignition coils.
^ Open throttle fully.
^ Use VAG1381 or VAG1763 compression tester to check compression.
^ Operate starter until no further pressure increases are indicated by VAG1381 or VAG1763 compression tester.





Compression pressure