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1990 Mercedes-Benz 190E Question: Why do brakes have no power when car started.

 

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jhndlln583, Plainfield, IN, November 10, 2012, 09:54
 Rookie

I replaced booster and mastercylinder. All 5 brake lines and calipers. System has presure until I start engine and then no brakes and pedal drops to floor?

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  • Answer #1

    edward123 November 10, 2012, 14:59
     Rookie

    was the whole system bleed to get rid of the air /<?Sounds like you have air in the system

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    jhndlln583, November 10, 2012, 16:58
     Rookie

    I bled rear brakes and front brakes from the calipers with a vacum pump

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    edward123, November 11, 2012, 16:41
     Rookie

    The best way to get the air out is to have someone pump the brake until it`s hard and then bleed the lines till you have brake fluid coming. I wouldn`t trust a vacume pump..

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  • Answer #2

    your.mechanic November 10, 2012, 22:56
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     Master

    possible air in lines...brake bleeding is critical

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  • Answer #3

    ziptie12 November 11, 2012, 19:25
     Master

    Incorrect adjustment between master cylinder and booster. Describe , again , the symptoms and difference from shut off to start-up.

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