Impreza L Sedan F4-2.2L SOHC (1997)
Vacuum Brake Booster: Pressure, Vacuum and Temperature Specifications
FLUID PRESSURE
Engine Off
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With brake pedal force @ 147 N (33 lbs.) the fluid pressure should be 785 kPa (114 psi).
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With brake pedal force @ 294 N (66 lbs.) the fluid pressure should be 2,158 kPa (313 psi).
Engine On - 66.7 kPa (19.69 inHg) Vacuum
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With brake pedal force @ 147 N (33 lbs.) the fluid pressure should be 5,492 kPa (796 psi).
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With brake pedal force @ 294 N (66 lbs.) the fluid pressure should be 8,434 kPa (1,223 psi).