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:
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lemon-manuals.org.ua
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Vacuum Delay Valve: Description and Operation
This valve is used on some V8 engines and is located in the vacuum hose to the
EGR valve. Its purpose is to delay vacuum from bleeding down at the EGR valve. The vacuum is metered through a .005 inch orifice and requires up to 4 seconds from vacuum to bleed down completely.