Question about 1997 Saturn SL

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Spongy brake pedal

I have already bleed entire system. do u think it could be the brake booster or the master cylinder

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Could be the master but NOT the booster
the booster increases pedal effort and when it goes you have a HARD pedal

...go to your parts store and ask for a brake booster bleeder kit and bench bleed the master on the car...if the pedal is still spongy then YES its the master

However, more often than not, a vehicle with ABS this year, that had the pistons pushed in during service suffer from ab HSU failure'

Posted on Apr 29, 2010

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My brake pedal is spongy, what would cause that? fluid level is good


air in the line or bad booster. try getting the brakes bled if it doesnt fix it probably a bad booster

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when you replaced the master cylinder , did you bench bleed it , in order to get all of the air out it, before installing it, and afterwards, it is recommendable to bleed all 4 wheels to get the air out also. "also some of the times , when a brake booster goe's bad the brake pedal can also become spongy.

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I think your saying you have a spongy pedal. have the brake system checked for leaks ( externally as well as internally eg master cylinder) and wear. If a-ok then have them bleed the system.
Now if your saying there is a problem with pedal travel
that has to do with pedal rod adjustment( which is only adjusted after replacing a master cylinder or booster)

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So long as the brake booster is working, test it by turning on the engine, press the brake pedal all the way down, then shut off engine keeping your foot on the brake pedal, if the pedal comes up slightly pushing against your foot then the booster IS working.

Did you BLEED the brakes??????

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