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 Sensor
If a
MAP sensor is not used, a Vacuum Sensor may be used, although some systems may not use either component. The vacuum sensor produces low voltage (approximately 1 volt) when manifold vacuum is low, and higher voltages (approximately 4.5 volts) when vacuum is high. Normal output is 0.54 - 0.62 volts with ignition on and engine stopped.