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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General

TESTING EGR

For complaints such as: Very poor engine performance, black or blue smoke.

Test conditions: Throttle linkage correctly adjusted, connect tachometer, engine at operating temperature, run engine at idle (750 ± 100/min), steering in straight ahead position, air conditioning turned off, selector lever of automatic transmission in position "P".

Tested: Exhaust gas recirculation (EGR).


Special tools




Conventional tools
Digital tester e.g. Bosch, MOTOO1.03
e.g. Sun, DIT 9000
e.g. Sun, 1019
Multimeter e.g. Sun, DMM-5

Self-made test connection