Trying to liocate low pressure ac valve found one near air filter and one in the center back of the egine

1998 OLDSMOBILE INTRIGUE
111,000 MILES
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UWMSCHOLAR05
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i found 2 ac ports one in the back center of the engine and one under the the ac filter box none didnt have caps on them and i was wondering which one was the low pressure port so i can refill my refrigerant.I think its the port close to the air filter box but im not sure.
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May 29, 2012 at 1:33 AM
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FIXITMR
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it's the 1 your hose fits onto. they are different so you cant mix them up.
May 29, 2012 at 3:04 AM
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FIXITMR
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also it's the 1 on the LARGER line from compressor and it's supposed to have a blue cap.
May 29, 2012 at 3:15 AM
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UWMSCHOLAR05
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none of the lines have a cap on them you say they are different so when i go get the refrigerant and valve it should only fit on one of the 2 ac ports
May 29, 2012 at 3:25 AM
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FIXITMR
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correct.
May 30, 2012 at 6:35 PM