I changed the rear brake pads, discs and callipers on my 1.9 GT and bled the brakes. Brakes are pretty much non existant and feel I may have done something wrong. Took it to a garage today who have pressure bled it but pedal still is pretty much non responsive. Cant afford to keep paying to chase the fault. Does anyone have any idea's or know what may be wrong with it.

Cheers

If you have changed all of the brakes (front and back) they might need to be worn in, do they work at all or are they just bad?

Only the rear were changed. Pedal does nothing until the last inch of travel. Looked online and found something mentioning master cylinder on other cars but got discredited in the answers so want to rule that out but not sure.

Sounds like you need to bleed again...remember to bleed rear to front (longer to shorter lines one by one) and keep fluid to max.

I found something online about it possibly being air in the ABS system so going to pop into fiat on my walk to the garage and see if they agree and how much they will take to bleed the ABS and then ask the garage it is at if they have the equipment to bleed the ABS and what they will charge to do it. If its not that then **** knows.

I've heard it said that on a car that's several years old, bleeding the brakes can sometimes cause master cylinder failure because after years of not moving very far, all of a sudden the master cylinder piston is shoved all the way down the cylinder - pushing the seal over a part that it hasn't traveled over and which might have rust spots on it, which then damage the seal, so that you don't get a good pedal.

If you get in the car and pump the pedal three or four times, does it firm-up and bite higher off the floor? And if you leave your foot on it after doing that, does it gradually sink back down to the floor?

Agree with AVOCET: seems the msot likely explanation here. Care needs to be taken with that pumping when bleeding.