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

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EGR Valve: Testing and Inspection

1. Clean dirt or other deposits from the Exhaust Gas Recirculation (EGR) valve.

2. Start the engine and run it at idle.

EGR Valve Vacuum Test:






3. Connect a Rotunda Vacuum Tester 021-00037 or equivalent and apply vacuum.

4. Verify that the engine runs roughly or stalls at more than 5.4-7.7 kPa (40-60 mm Hg, 1.6-2.3 in Hg).

5. If not as specified, replace the EGR valve.