Alright, I replaced my hydro boost on a 99 truck this morning. Now I have a really hard pedal. Hard to the point of having to jam on the brakes to stop. They were fine before I did this. I did replace the brake fluid in the M/C res. by sucking it out and refilling. Also, I bled the p/s system like the instructions said. Any ideas?

Thanks!

 

Bad replacement hydroboost unit?

 

You were right. I replaced the bad unit today and it work like a champ!

Thanks!