The flow control valve is stuck or inoperative.

1. Replace or clean the vanes.
2. Refer to the appropriate procedure:

•	Power Steering Pump Disassemble (LG4 with JE3)

•	Power Steering Pump Disassemble (LG4 with JE4)

The pressure plate is not flat against the cam ring.

1. Replace the pressure plate.
2. Refer to the appropriate procedure:

•	Power Steering Pump Disassemble (LG4 with JE3)

•	Power Steering Pump Disassemble (LG4 with JE4)

An excessively worn cam ring.

1. Replace the cam ring.
2. Refer to the appropriate procedure:

•	Power Steering Pump Disassemble (LG4 with JE3)

•	Power Steering Pump Disassemble (LG4 with JE4)

A scored pressure plate, thrust plate, or rotor.

1. Replace the components.
2. Refer to the appropriate procedure:

•	Power Steering Pump Disassemble (LG4 with JE3)

•	Power Steering Pump Disassemble (LG4 with JE4)

The vanes are sticking in the rotor slots.

1. Clean the vanes.
2. Refer to the appropriate procedure:

•	Power Steering Pump Disassemble (LG4 with JE3)

•	Power Steering Pump Disassemble (LG4 with JE4)

Improperly installed vanes

1. Inspect the pump for internal damage.
2. Refer to the appropriate procedure:

•	Power Steering Pump Disassemble (LG4 with JE3)

•	Power Steering Pump Disassemble (LG4 with JE4)

There is air in the fluid.

Locate and repair the leak.

There is damage on the hoses or the steering gear.

Replace any damaged components.

The power steering fluid is low.

Add an adequate amount of power steering fluid.