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. Check vacuum diaphragm function by applying an outside vacuum source to vacuum supply tube at top of vacuum diaphragm. The diaphragm should not leak down and should move to the full up position at approximately 7 inches Hg vacuum.
2. Check EGR valve diaphragm for cracks. Replace EGR valve, if necessary.
3. Check for damage and carbon deposits around valve or seat. Replace EGR valve, if necessary.