READ THIS FIRST:
http://auto.howstuffworks.com/auto-pa ... ake-types/power-brake.htmSpecifically look at animation:
http://auto.howstuffworks.com/auto-pa ... ke-types/power-brake2.htm- The pedal will get pulled in a little if the pushrod is not the correct length into the master cylinder.
- The brake lights come on if this happens.
The air from the cabin (blue) should never meet the vaccuum side (red). This is the major reason that a change in idle will occur.
The booster has a hole in the diagram.. get a refund or find another one.
If the booster comes from a turbo car that didn't run a one way valve..this will blow a hole in the diaphram.