RX7 2RTR-1308cc 1.3L MFI (1991)
PRC solenoid valve, which blocks manifold vacuum to the pressure regulator and vents the regulator diaphragm chamber to the atmosphere. With
atmospheric pressure at the diaphragm, fuel pressure is increased. The increased fuel pressure helps reduce fuel percolation due to heat. The PRC
solenoid is energized for about 50 seconds after the engine is started. After this time, the PRC solenoid is turned "OFF" and normal vacuum modulation
of the fuel pressure is resumed.
