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Re: I can't find the Low Port to refill the A/C...
There is a cooler in front of the radiator with aluminum lines connected. The port is on the return line. Follow those lines from the radiator area until you see a port.
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Look back on the firewall for the two a/c lines. One is large and on is much smaller. The larger line is the low pressure line. Follow that line back to the compressor. The low pressure port will be on that line.
The A/C Fill port is the low pressure service port on this diagram;
It is located on the larger diameter aluminum tube coming back from the evaporator and firewall, to the A/C compressor. The fitting will have a taller skinnier cap on it, that may be blue or black. Not red. The R134a refrigerant cans will not connect to the high side port. This is good since the can could potentially explode/vent causing a sort of instant cryo frost bite to exposed skin. I recommend wearing gloves when recharging A/C sytems, especially if you are new to refrigeration systems.
The low side port is under the passenger side fender toward the front at the accumulator (receiver/dryer). It is accessible, just a bit of a pain in the **** when they could have and should have located it in an area that would be easier to access. Good luck and please ask if more info is needed.
not sure what you mean by refill cylinder, but there are two ports to charge a a/c system, low side and high side, you fill on the low side, if you are using a can you bought from wal mart or a auto parts store than most come with a small hose that connects from the can to the port, you cannot mess it up, the hose will only connect to the low side port, the high and low side ports are two different sizes, one is located on top of the engine by the suge tank area, the other is located/accessed from under the front right of the car, look for a big hose coming from the a/c compressor and just follow it till you find the port, the big hose is your low side hose.
You have a leak in the ac system, u will have to have the system leak tested and the leak repaired before adding anymore very expensive R134 refridgerent.
Keep following the refridgerant lines until you find the low pressure connector. Sometimes it is tucked away in a difficult place behind the engine near the firewall. Make sure you've found the low pressure connection. DO NOT try to force refridgerant into the high pressure connection.
The low pressure service gauge port valve is located on the evaporator to accumulator/drier suction line.
The evaporator to accumulator/drier suction line contains low pressure refrigerant gas and is equipped with a serviceable low pressure A/C charge valve port.
The one closest to your AC compressor... i.e. the part that the belt spins around.. Is the low side.. Not to mention, air conditioning recharge hoses ONLY FIT on the low side.. Worst case scenario, try both.. the one that it clamps down on to is the low side..
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