I have a 93 ford explorer, my brakes line went out a few months back and i have just gotten around to replacing them. once i got the new line installed i bled out the lines and i had pressure, but as soon as i turn the truck on it all goes away instantly. i have checked under/around all the brake lines and there is no leak any where. does any one have any idea what i can do to try and fix it?
Yes, get smaller rims. A lot of after-market shops made a LOT of money selling over-sized rims for cars that should not have them. That little Mazda 3 shouldn't have rims over 16 inches. 15 if it was my car.
check and make sure your rear brakes are adjusted properly there should be a slight drag on them when your turning the wheel if its not that then your master cyclinder is bad the reason you get a pedal with iot off is because of the brake booster has no vacuum on it
If a brake system is left open, the fluid turns caustic and eats up the piston areas of the brakes. So I suspect that the wheel cylinders (calipers) on the brakes have developed leaks.
You don't say what goes away exactly? Do you mean the brake fluid goes away, or that the pedal gets soft and you have to pump it up? I would not be surprised if there was not still some air in the system. You often have to bleed it again and again when you have to replace a whole line. There is a low pressure procedure for bleeding that works much faster. Instead of trying to pump up pressure, you open the bleeder before any pedal movement, and then you close it as soon as the pedal is down. This moves much more fluid down the line, and does not allow air to prevent movement. You still have to follow up with normal pressure bleeding however.
