the pump is out of the question since the left turn is normal as per the description.
the suspension/steering components/pivot points have been replaced
the possible causes
1-the tie rods were installed wrong (binding due to installation at the extreme opposite end of its expected range of motion)
2-the directional control valve in the steering worm (recirculating ball nut system) has either foreign object debris
3-hopefully not, the torsion shaft of the directional control valve has snapped