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)

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Fuel Pressure Regulator





System Pressure -- 6.1 - 6.5 bar (88 - 94 psi)
Differential Pressure (regulator plug disconnected) -- 0.3 - 0.5 bar (4.3 - 7.3 psi) below system pressure
Differential Pressure (regulator plug connected) -- 1.2 - 1.5 bar (17 - 22 psi) below system pressure
Shut Off Pressure (after 5 seconds) -- 3.7 bar (54 psi) max.
Residual Pressure
After 10 Min. -- 3.5 bar (51 psi) min.
After 20 Min. -- 3.4 bar (49 psi) min.
Fuel Injectors
Opening Pressure -- 4.3 - 4.6 bar (62 - 76 psi)
Volume (with air flow sensor at full throttle stop for 20 sec.) -- 80 ml
Difference Between Injectors (after 20 sec.) -- 8.0 ml
Differential Pressure Regulator Resistance -- 17.5 - 21.5 ohms
Differential Pressure Regulator Normal Operating Current -- -10mA to +10mA
Differential Pressure Regulator Maximum Operating Range -- -60mA - +100mA