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Posted on Jul 11, 2012
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Where is the low ac port on 1999 Mitsubishi gst

Need to put freon in car cannot locate the low ac port

2 Answers

Marvin

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  • Cars & Trucks Master 85,242 Answers
  • Posted on Jul 11, 2012
Marvin
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The charging port is in the low side AC line from the AC compressor on the engine, the low side line is the larger of the two lines coming from the AC compressor.

  • Larry Matthews Jul 30, 2014

    why is the low side recharge a screw type instead of a quick connect on 1999 cutlas

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Stephen

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  • Cars & Trucks Master 21,873 Answers
  • Posted on Jul 11, 2012
 Stephen
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Should be two ports on the compressor or the ac lines. When the car was new they had plastic covers. One is bigger than the other to help prevent you from connecting to the wrong side of the compressor.

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5 Related Answers

emissionwiz

Marvin

  • 85242 Answers
  • Posted on Apr 07, 2009

SOURCE: location of low side ac port

the low side charging port is near the AC Accumulator/Reciever dryer cannister in the larger of the 2 AC lines.

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countrysi248

Jerry Koski

  • 443 Answers
  • Posted on Apr 25, 2009

SOURCE: ac low side service port location

Your service port will always be in the larger line of the two .. which is low pressure side. It might be in the dryer also which is low side.. your dryer is about 3 inches across and 8 inches long and also has your pressure switch for the AC compressor in it.. holler if you dont find it now... thanks Jerry

dgnoid

  • 84 Answers
  • Posted on Jun 23, 2009

SOURCE: Where is the low pressure line AC for Express 1500

Look for the accumulator(silver can a/c lines go to) on the passenger side of engine area. The Low side charging port cap should be on the side of the accumulator.

emissionwiz

Marvin

  • 85242 Answers
  • Posted on Jun 25, 2009

SOURCE: where is the ac low pressure port to recharge the

It is on or near the reciever dryer or shiny looking thing at the right rear of the engine compartment. You need gauges to correctly add refigerant as you can overcharge it.

Anonymous

  • 5 Answers
  • Posted on Oct 28, 2009

SOURCE: I need to specifically know

Not sure what year your car is but on 2004's the low side is low behind the engine on the pax side. Near the alternator.

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The people who answer questions on this website do it for free.
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Hi .. I just ran into the same problem .. I have a 2000 Expedition with the 5.4L engine .. the low side port is located on the passenger side of engine compartment just below the black metal bracket that contains electrical connections right in front of the firewall... you have to reach under this and locate the low side (larger line) and feel for the connection .. it is right in front of the accumulator .. There are two heater hose that hide the port .. you have reach under these to unscrew the port cap which is black .. you'll have to do this by feel .. I have found that you can by R134A charge with dye and leak sealant helps with small leaks .. if the system takes more than two cans be usre to add refrig. oil .. hope this helps
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Adding freon will not correct the problem. If you need to add freon, you have a leak, and you have moisture in the system, the leak should be located, mositure removed, then freon added. But to answer your question. Open the hood on, the left side you will see a round object called a dryer, you will see two pipes coming from it, one at the top and one at the bottom. The smaller is the high side, the larger is the low side. Obtain a can of freon either R-22 or 134a with an adapter for installing the freon. Turn the engine on, turn the AC to high. Add the freon to the ac using the low side.
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Hope i was able to answer your question...be safe.
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