If an abs sensor is broken and the light is on could this affect the pump and the way it pressurize's. Cos since i changed me calipers and broke a sensor i cant get the brakes to bite how they used to (nice and keen), but if i press the pedal a few times i can hear the pump come on and the brakes feel as they did before the change. Sharp as a pin.

 

if the sensor is open circit it sometimes thinks the wheel doesn't need as much stopping power
i can't really explain it but i'm sure someone else will come along soon enough to tell you

when i did my abs sensor i had actually chewed through the sensor when the wheel bearing went and i had the same spongey pedal until it pumped up
change the sensor or even unclip it and see if it makes a difference

one thing was that none of the lights came on but if it's the handbrake light you shouldn't realy be driving it

 

have you bled the system?

 

yeah about 10 times each side. thats whats making me think its maybe sommat to do with the abs.