my lowrider hydraulics stop working, they wont lift the car up
Take it to a hydralic repair place--the valves may be gone--the solenoids may be gone--the fluid may be gone --the pistons may be gone---you need serious help
I am guessing that it is an air operated hydralic system? In which case, you probably have a small leak at one of the connections, and you can't produce enough air pressure to raise the car. Use soap and water to check the connections. Also could be a blown seal in any of the hydralic cylinders, as one failure probably messes up the whole system. If all that fails check the pressure being generated by the pump, as the pump may have a blown seal or something causing it to not generate enough air pressure.