i've had the same issue, you have to try to get all the air out. What you need to try is to elevate the front tires off the ground, and cut the engine. Turn the steering wheel from left to right, all the way both ways, about a dozen times. With the wheels still elevated, turn the car on. Then do the same thing, turning the steering left to right all the way each way, about a dozen more times. Lower the front again and check if the issue is fixed.
If the issue is still there, you probably need a new pump. Goodluck.