Re: No brake pressure when engine is running?
I just reread your post and it may be your rear brakes. Do you have a parking brake installed. SOmetime you have to pre-adjust the rotor. If you just push the piston in and leave too much room up against the pads it can cause the pedal to act spongy. You have to seat the rear caliper with the piston up against the pads and right up close to the disc. Otherwise sometimes tha parking brake gets in the way and causes you caliper to push away from the disc. Maybe this wil help
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