When trying to stop the breaks are quite non-effective although I have bought new pads and shoes for the car but was told that they didn't need replacing as there was plenty of wear left, the car then went on to pass the MOT break test.
Could it be I need new discs or does the breaking system need bleeding??
If its a diesel it could be the vacume pump. you can test this yourself. get into the car do not start the engine.now keep pressing the brake pedal until it feels stiff.now press the brake pedal while you start the engine you should feel the pedal pull down with servo assistance.The same applies to a petrol engine but there is no vacume pump on a petrol engine as it uses intake vacume for the servo.As your problem is intermittemt i would not think it is the servo.Hope this helps you.
Ras
January 2011
Automatic Answer
We may have found other answers which could help you.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix cars.