Have a 99 honda civic put new pads, master cylinder and bleed breaks, pedal hard when running but turn off car pedal goes soft?

Have a 99 honda civic put new pads, master cylinder and bleed breaks, pedal hard when running but turn off car pedal goes soft?

Did you bleed the master cylinder.

That's normal. The power assisted braking needs a vacuum produced by the engine to function as intended. Switch the engine off and the vacuum disappears quite quickly resulting in a soft pedal. The braking function is still there but you need much more effort to apply the brakes.

Remove the master cylinder and bleed it on a bench. Reinstall the master cylinder and bleed the brakes normally. Clean the slide bolts.

Normal operation… And its BRAKES.