Ford Powerstroke Diesel Forum banner

Brake problem

1K views 1 reply 2 participants last post by  mschn99 
#1 ·
We have 1996 F350 powerstroke and when we operate brakes the second push of the pedal will result in the pedal going hard.The vacuum pump is working but it is possible that it cannot keep up.We replaced the booster yesterday and the problem is still there.Any suggestions?
 
#2 ·
merv dessent said:
We have 1996 F350 powerstroke and when we operate brakes the second push of the pedal will result in the pedal going hard.The vacuum pump is working but it is possible that it cannot keep up.We replaced the booster yesterday and the problem is still there.Any suggestions?
i have seen weak vacume pumps cause a concern like this.......what you want to do is feel how much vacume the booster is putting out after someone has stood on the brakes for a while......i bet it builds enough vacume for the one braking and takes quite a while to build enough for the second.......Marc
 
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top