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These are notes from the 1996 Prizm manual.
The EGR "Pressure Transducer" or "Vacuum Regulator"
Clean the filter by blowing compressed air through it and install it with the coarser side facing outward (I suppose "outward" = "upward")

The red thing at the left of your top picture is called the "Vacuum Regulator Solenoid" in the manual. The resistance across its terminals should be 37 to 44 Ohms. With the power to the solenoid disconnected, look where the pair of hoses enters the solenoid. Remove the hose of the pair that is nearest the electrical connector. Blow air into this nipple and see that it comes out of the contraption on the other side of the electrical connector.
 
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