Manuals through 2025 now available!
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LEMON is the spiritual successor to CHARM, I recommend you try it!
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lemon-manuals.org.ua
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Low Pressure Regulator (LPR)
The low pressure regulator (LPR) is a two stage regulator. The fuel enters the LPR at the intermediate stage pressure of
115 to
220 psi (
793-1517 kPa). The first (primary) stage of LPR operation reduces the
fuel pressure down to between
4-6 psi (
28-41 kpa). The fuel pressure is then again reduced in the second (secondary) stage of the LPR down to between
2-5 inches (
5.1-12.7 cm) of water column or around
0.21 psi (
1.5 kpa). The fuel exits the LPR and flows through the low pressure hose and into the gas mass sensor/mixture control valve (GMS/MCV). The LPR contains two
1/8 in (
3.175 mm) NPT test ports with plugs. The plugs are removable in order to allow the installation of a pressure gauge for diagnostic purposes. One port tests the first (primary) stage and the other port tests the second (secondary) stage. Refer to Fuel System Diagnosis for pressure checking procedures.