Originally Posted by daepanamacity
I bled the back brakes fine but when i tried to bleed the front brakes, nothing came out at all. What could be the problem? ...
Well the front is on a different circuit to the rear (for safety reasons). So I think it is likely there is still air trapped in that circuit preventing you from building up pressure there.
But first check you have the reservoir chamber for the front-circuit full of brake fluid of course.
And also maybe make sure your front bleed nipples aren't blocked. (Perhaps remove them completely to check this? And to check whether any fluid dribbles out with the nipple removed?)
If those things fail to find/fix the problem -then perhaps try more innovative ways of getting the air out.- For instance I have resorted to using a big "vet syringe" to pump (reverse flush) clean fluid in from a wheel cylinder nipple and out at the master cylinder.
But I'm not familiar with your vehicle. (Mine is an older drums-all-round cruiser.)
...I put the wheels back on and started the motor and drove it a little way and the brakes work but they are spongey as if they have air in them.
Well - without having properly bled the front - I'm surprised you got brakes at all (without having to pump-up the brake pedal).
Clearly you need to get those bleeders working on the front.