Power Steering Idleup

The power steering system draws a significant amount of horsepower from the engine when the steering wheel is turned to either stop. This can have an adverse effect on vehicle driveability. To address this potential problem, many EFI engines equipped with power steering use a power steering idle-up system which activates whenever the steering wheel is turned to a stop.

The power steering idle-up system consists of a hydraulically operated air control valve and a vacuum circuit which by-passes the throttle valve. Whenever power steering pressure exceeds the calibration point of the control valve, the valve opens, allowing a calibrated volume of air to by-pass the closed throttle valve.

Because power steering pressure only exceeds the pressure calibration point of the valve when the steering wheel is turned to its stop, the system is only functional during very low speed maneuvering and at idle. The system can be tested by turning the steering wheel to a stop while listening for an rpm increase.

Air Flow Meter

Air Flow Meter

Valve
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Responses

  • MARCO
    Is the engine idling affects power steering?
    2 years ago

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