Good morning, my 88 quad has been sitting around for a few months now, needs front brakes. I took it for a drive around the block a few times and noticed that when brake pedal is pressed or tapped, it stays down and won’t come back up bringing car to a halt. I have to reach down and pull it back up to get car going again. Any idea what this could be? Feel a rumbling coming from back tires that goes away somewhat with continued driving. Could the calipers be stuck?