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

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Pressure, Vacuum and Temperature Specifications

ROLLOVER/VENT VALVE
Tank pressure to OPEN (max.) 1.0 psi (7.0 kPa)
Air pressure to vent tank (max.) 0.7 psi (4.9 kPa)

TWO-WAY CHECK VALVE
Vacuum To Open Port A (Fuel Tank Pressure) 1.46 in Hg (37 mmHg)
Vacuum To Open Port B (Barometric Pressure) 1.73 in Hg (44 mmHg)