Question about 1991 Toyota Previa

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Brake problems the problem started where i could only pump to apply pressure and sometimes it would return to half normal, but now all i can do is push it to the floor and gear down to stop, i have no leaks and have good pads, please help i can't afford a professional right now

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  • Toyota Master
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Thank you for allowing me to assist you, Before we do anyhing, I need some additional information.
Please respond to the following 5 questions so that I may be able to help you better.
Is you vehicle front disc/rear drum or front disc/rear disc?
When were the brakes changed last?
If so, front or rear?
If you apply the park brake, does the vehicle move at all when you put it in gear?
Finally, I am understanding that the brake pedal goes to the floor, you have no resistance on the pedal, and the vehicle does not stop when applying the brakes. Da?

Posted on Oct 08, 2008

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Posted on Jan 02, 2017

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Brakes seem to be dragging at times,fuel mileage goes straight to hell and then other times the car rolls right on out.cannot get problem to "happen". i know there is some sort of ******** that...


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There is never a test or reason to pump your brakes

Accomplishes absolutely nothing.

There is no pressure in a braking system at all,
until you SLOWLY apply the brake pedal.

Then less than 1" off movement in the master cyl,
will develop 600 to 1800 lbs at the wheels

Release the brake pedal, the system goes to zero,
IT DOES NOT HOLD ANY PRESSURE

To answer your question

You not suppost to press the pedal hard
The saying goes--you apply the brakes,
not force the pedal arm and pin into the
vacuum booster, as though you want to damage it

When your driving what happens ?
You have higher manifold vacuum and
thus your pedal is normal,why the VACUUM
brake booster

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C) The master cylinder push rod could be out of adjustment.

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