Vacuum Brake Booster

PRESSURE WITHOUT ENGINE RUNNING:
Pedal Force:
147 N (33 lbs.):
Without ABS 785 kPa (114 psi)
With ABS 588 kPa (85 psi)
294 N (66 lbs.)
Without ABS 2,158 kPa 313 psi)
With ABS 1,863 kPa (270 psi)

PRESSURE WITH ENGINE RUNNING [1]:
Pedal Force:
147 N (33 lbs.)
Without ABS 5,492 kPa (796 psi)
With ABS 5,394 kPa (782 psi)
294 N (66 lbs.)
Without ABS 8,434 kPa (1,223 psi)
With ABS 9,219 kPa (1,337 psi)

[1] Vacuum at 66.7 kPa (19.69 inHg).