Escort L4-116 1.9L VIN 9 TBI (1987)
Fuel Pressure Regulator: Description and Operation
Throttle Body Assembly
The fuel pressure regulator is used to maintain fuel supply pressure at 14.5 psi with the engine running and upon engine or fuel pump shutdown. The
regulator functions as a downstream check valve and traps the fuel between itself and the fuel pump. Maintaining fuel pressure upon engine shutdown
precludes fuel line vapor formation and allows for rapid restarts and for stable idle operation immediately thereafter.
The pressure regulator is an integral part of the fuel charging main body and is located near the rear of the air horn.
