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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1990 Mercedes-Benz 190E Question: Why do brakes have no power when car started.
Answer #1edward123 November 10, 2012, 14:59Rookie
was the whole system bleed to get rid of the air /<?Sounds like you have air in the system
Replyjhndlln583, November 10, 2012, 16:58Rookie
I bled rear brakes and front brakes from the calipers with a vacum pump
Replyedward123, November 11, 2012, 16:41Rookie
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..
Answer #2your.mechanic November 10, 2012, 22:56Master
possible air in lines...brake bleeding is critical
Answer #3ziptie12 November 11, 2012, 19:25Master
Incorrect adjustment between master cylinder and booster. Describe , again , the symptoms and difference from shut off to start-up.