Jake75

iTrader: (2)

I completed the hydroboost swap on my truck and now i have no rebound in my brake pedal. If i push the pedal it stays on the floor i actually have to pull it back to the up position. What could be wrong? I changed the master cylinder when i did the swap and completed the power steering bleed procedure and still no luck.

Wolftrk99

iTrader: (5)

Was the hydroboost a used or new/reman unit? Sounds like the return spring around the rod is either not there, worn out or broken.

Jake75

iTrader: (2)

i got it from lkq online. Is that something easy to check or is it internal

Wolftrk99

iTrader: (5)

Pull the master cylinder off the front and look for the pushrod and there is a retainer that usually looks like a 6 pointed star, that holds the spring in place, it will pop out with a pair of needlenose pliers (prefer to use the small hose type, with the flared jaws) and the spring should be behind that...

Wolftrk99

iTrader: (5)

Looks something like this..

Jake75

iTrader: (2)

awesome thanks ill check tomorrow

Jake75

iTrader: (2)

Ok I pulled the master cylinder off and the pedal rebounds like it's suppose to. But with it on the stays down and I have to pull it back up

Wolftrk99

iTrader: (5)

What did the hydro boost come out of?

Jake75

iTrader: (2)

i honestly dont remember. I wanna say it was from a 2005 silverado 2500

Wolftrk99

iTrader: (5)

Unless something is binding when the master is installed, such as the spring in the front of the hydroboost around the pushrod.