What does POA stand for on an automotive AC system?

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My car is making a horrible high pitched squeaking noise after I drive about 10 miles.?

This is information I found on it.

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A POA Valve is a pilot operated absolute valve. It is in the suction line. It keeps the evap pressure at about 30 psi so it is cold , but not cold enough to freeze up and restrict air flow (ice).

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If you had a GM car in the late 60's-70's it had one. They were about 8 in. long, and went bad often. When the POA became bad they turned into a expensive orfice tube. Most cars are orfice tube systems now. (GM uses a variable displacment compressor) Neat!

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A 92 Camry 4 cyl when i turn the car on is starts and drives but after a little while the car shutsoff(Reverse

I'll take a guess at this, point of access.

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Is is possible to put a GM small block (ie 350) into a transversely mounted setup (FWD)?

pilot operated absolute. this valve is nonservice

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