low brake padal and bounces on 1999 Ford F-250 Super Duty

after having 1 injector and exaust censor replaced the brake pedal presses lower than before also it bounces when pressed quickly

1 answer
Take your truck back to the shop who did the work. They must have accidentally bumped something when they did the other work or forgot to re-install something. it happens. We technicians are only human. Do it ASAP, so they will remember you and before the warranty for this repair runs out which is maybe a week to 30 days.