93 Chevy Blazer S10, brakes freeze up

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ska_ter77@hotmail.com - 27 Aug 2008 04:03 GMT

At seemingly random times I will go to push the brake pedal only to
find that it wont budge. Most often the resistance wont last more than
a second or two but I have on rare occasion had to use the emergency
brake to slow down. Usually air in the line manifests itself as
'squishiness' - is it possible for air to produce the symptoms I'm
describing? Perhaps more likely is a faulty master cylinder? Any
ideas?

Thanks,
Jonathan

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lugnut - 27 Aug 2008 14:06 GMT

>At seemingly random times I will go to push the brake pedal only to
>find that it wont budge. Most often the resistance wont last more than
[quoted text clipped - 6 lines]
>Thanks,
>Jonathan

The problem you have is most likely the brake booster control valve - more
precisely, the reactor disc cracked. A replacement booster is usually the best
cure unless you have expertise in booster rebuild. If the vehicle is high
mileage, a master cylinder at the same time would also be a good idea because
any debris in the MC may become dislodged causing problems after the booster is
replaced and become fully functional.

Lugnut

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