0.677,0.229 0.99,0.385 0.313,0.156 10 false *a 2.156,0.26 2.469,0.417 0.313,0.156 10 false *b 1.104,0.781 1.417,0.938 0.313,0.156 10 false *c 1.573,1.542 1.885,1.698 0.313,0.156 10 false *d 2.333,0.875 2.646,1.031 0.313,0.156 10 false *c 2.844,1.521 3.156,1.677 0.313,0.156 10 false *d

*a	Ventilation
*b	No Ventilation
*c	Engine Side
*d	Booster Side

Check that there is ventilation from the booster side to the engine side, and no ventilation from the engine side to the booster side.

If the result is not as specified, replace the brake vacuum check valve assembly.