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)
Or, hide this message:
temporarily or
permanently
Vacuum Modulator Valve (VMV)
The vacuum modulator valve is installed between the Transmission Converter Clutch (
TCC)
solenoid and the
EGR/
EPR valves on V6 and V8 diesel engines. The VMV limits the vacuum signal to the EGR/EPR valves to 13 inches Hg.