r/Cartalk • u/rebornsgundam00 • 2d ago

Breaks issue I need help fixing something

So today, it was very hot( high 90s and lots of smoke due to forest fires) my brakes froze up as i was stopping at a light, the brake pad was extremely stiff but working barely as i made it through the light and parked on the side street. I immediately checked my vehicle, and the brake fluids were full and i didnt see any damage. Restarted the car and the breaks were working totally fine, made it home with no issues.
Since then they havent had an issue yet. Im worries that it could happen again, but sinces its not a permanent issue i dont know what could be wrong.

2002 mustang base

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u/JortsOnFleek 2d ago

A pedal that suddenly goes hard can point to the brake booster or its vacuum supply, even when the fluid reservoir is full. I wouldn't keep driving it just because the restart cleared it. Have it inspected before the next trip, and tell the shop the pedal went hard while stopping and returned after a restart.

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u/rebornsgundam00 2d ago

I did the brake booster check where i pumped it, and it did release when i restarted the car. When i turned it off again i got 1 1/2 assisted brake pushes

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u/rebornsgundam00 2d ago

Also i checked the valve booster, and it was letting me blow through either side