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

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
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?
Incorrect adjustment between master cylinder and booster. Describe , again , the symptoms and difference from shut off to start-up.
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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