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Test for brake booster:
Checking without a tester. Check the 3 tests in order.
(1)
1-With engine stopped, depress pedal several times
2-Start engine with pedal depressed
3-The unit is good if the pedal moves down very slightly immediately after the engine starts
(2)
1 start the engine
2- stop the engine after it has run for 1 or 2 minutes
3- Depress the brake pedal by applying normal force
4- the unit is good if the stroke is long the first time the pedal is depressed and becomes shorter as the pedal is depressed repeatedly (as long as rear drum brakes are adjusted properly, to compensate for non-adjusted rears, apply e-brake fully before perfoming this test)
Note If the results of this next test are unsatisfactory, check for damage or improper installation of check valve or vacuum lines. If a problem is found make repairs then repeat test.
(3)
1-Start engine
2-Depress pedal by applying normal force
3- With pedal depressed, stop the engine
4-Keep pedal depressed for ~ 30 seconds
5-The unit is good if there is no change in pedal height.
If it is still pulling to the right, there is something wrong with the left front brake system.
If the pedal is rock hard, check for stuck caliper, wheel cylinder or improperly installed pad.
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