Knob between throttle body and power steering, what is its purpose?

2002 FORD EXPEDITION
100,500 MILES • 5.4L • 2WD • AUTOMATIC
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CHEDDAROSS86
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There is a knob between the throttle body and power steering reservoir. What is this for?
Jul 30, 2022 at 7:25 PM
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SQM
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Hello,

Can you please upload a picture so we can see what it might be?
Thank you.
Jul 30, 2022 at 10:05 PM