Lost pwer brakes! 348ts

Did they return? or is it still not working...no brake pressure usually means air in the lines...the question is, how did the air get there....what year is your car?

 

I take it you mean that the pedal is hard and the brakes work, but with no assistance. Can you hear the charge pump running (front of the car) when you turn on the ignition?? (without starting the engine, it might be difficult to hear otherwise).
It should run for a few seconds (after which the brake warning light goes out). Does the brake warning light or ABS light come on at all?

 

What's a 248?

 

If you would fill out a profile, and possibly tell us what year, and when and what happened you might get more responses.

Unless everyone was responding via PM, in which case I will Shut UP!

-A

 

Had a similar problem with my 328GTS....it was a check valve in a vacuum line to the master cylinder. Mechanic replaced the check valve, fixed. One of the cheaper repairs on the car...

 

If you work the brake a few times with the ignition off and then switch it on again, the electric brake booster pump should work. It is a loud, vibrating sound that gets a little higher and then stops after approximately 20-30 seconds.
If you don’t hear it, check fuses and relays first.
The unit itself is very reliable, the connections are first suspects.

 

Yes, start with checking to see if the abs pump is working - this provides basic pressure to the system, and, consequently, some of the "assist" you feel at the pedal. If you can hear or feel the abs pump working when the key is turned on, then, next to check is the accumulator. The accumulator acts to help with maintenance of the pressurization from pump - the accumulators do fail with some regularity.

 

A typo . . . ?