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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EGR Valve: Testing and Inspection

1. Start the engine and run it at idle speed.

Testing EGR Valve:





2. Connect Rotunda Vacuum Tester 014-R1058 or equivalent as shown and apply vacuum.
3. Verify that the engine runs roughly or stalls at more than 8.67 kPa (2.59 in Hg).
4. If not as specified, replace the Exhaust Gas Recirculation (EGR) valve.