Originally Posted by Biodiesel300TD

There is no flow through the rear parts(accumulators and struts) when the car is being held at height. The way the system works is that the pump is always pumping fluid to the valve. If the system is sitting level the fluid just goes back to the res. When you load the rear the valve then open the port to supply the rear parts with more pressure and fluid. Which raises the rear, until it's level again and then it cuts off the flow and maintains the pressure in the rear. Then when you unload it the valve allows the pressure and fluid to flow back out until it's level again. So if you have air in the accumulators or struts and you simply drive it. You're not actually running fluid through the struts or accumulators. To get all that air out you need to weight the rear down a few times. This will push fluid through the whole system and purge air out.