Brakes spongy

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Oct 14, 2007 | 05:06 PM

jqp00002

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Joined: Jan 2005

Posts: 32

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Brakes spongy

I have a 91 F-250 7.3. I have replaced the master cylinder and power booster. I also have replaced the vacuum pump. The truck will stop just fine, but the pedal does not feel firm and the brake light on the dash comes on occassionaly. I considered replacing the low brake vacuum unit. But I cant find anyone that has it and the dealership needs to know the exact part name before they can assist. Is it called low vacuum warning sensor?

Oct 14, 2007 | 05:31 PM

faststang94

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Joined: Mar 2007

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if your vacume pump was bad you would have had a hard pedal not soft. make sure your brake lines are ok and you have all the air bled out of the system. leaky wheel cylinders and or low liner in the front or back can cause a mushy pedal as well

Oct 14, 2007 | 08:37 PM

PLC7.3

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Joined: Nov 2004

Posts: 5,638

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From: Manitoba

Did you prefill and bleed the M/C........Did you bleed the brakes and RABs valve..

Brake light could be the park brake ........ not releasing completely.