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    wayne299's Avatar
    wayne299 Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Apr 14, 2009, 06:28 AM
    Toyota 4 runner brakes
    I changed the master in my 1997 toyota 4 runner and bleed the brakes and master cyclider and the brake petal still is soft when I brake please help!
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
    Uber Member
    		  
    #2

    Apr 14, 2009, 06:41 AM

    . Did you bleed brakes in this sequence: RR, LF, LR, and RF?

    . Was your bleed technique good? Did you use a "one-man" bleeder? Harbor Freight has an inexpensive one-man bleeder (No. 98864) for $3.99. It has a one-way check valve. I use a similar product from Cal-Van.
    kitch428's Avatar
    kitch428 Posts: 1,440, Reputation: 152
    Ultra Member
    		  
    #3

    Apr 14, 2009, 01:23 PM

    Look for a load sensing valve at the rear axle and make sure it's bleed there too.
    You also have 4 piston calipers and one of them may be seized causing irregular brake pad contact.
    this8384's Avatar
    this8384 Posts: 4,564, Reputation: 485
    Ultra Member
    		  
    #4

    Apr 14, 2009, 02:36 PM

    Did you bench bleed the master cylinder prior to installation?

    Also, where did you purchase the master cylinder from? We had a customer get 3 different master cylinders for his Toyota truck from the same supplier and his brake pedal stayed spongy; we got him one through our supplier and the problem was fixed immediately.
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