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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System Check

Fig. 7 Checking EGR valve diaphragm:

Fig. 8 Checking movement of EGR diaphragm:

1. With engine running and coolant temperature below 131°F (55°C), check that EGR valve is not open by feeling diaphragm with finger, Fig. 7.
2. Allow engine to reach normal operating temperature. Race engine and check that diaphragm moves toward 1, Fig. 8, during acceleration and toward 2 during deceleration.