Question about 1993 Plymouth Voyager

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Air condition needs vacumn out and system recharged with r134r I think 1991 Plymounth Voyager carvan. I have a air to vacumn tool for air condition but never used it and I have an air conpressor that should work OK with the system. I also have a 2 guage refill system for R134.

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  • Kiffin Garrison
    Kiffin Garrison May 04, 2010

    An air condition expert told me that I needed to vacuum out the system first to avoid over charging the system. I have the equipment to do this with what I need to know is the procedure and if I need to and some sort of oil after I vacuum it out.

  • Kiffin Garrison
    Kiffin Garrison May 05, 2010

    I have an Air--Vac could you send me the procedure to use it to vacuum out my air condition system. Please send me the complete procedure. I have a 1991 Plymouth Voyager that has already been upgraded to R134.

    Thank you,

    Kiffin Garrison, Sr.



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  • 17,970 Answers

Check this procedure about how to recharge Air Conditioning; if your Plymouth Voyager is blowing hot air when the air conditioner is turned on, the system may need to be recharged. In models made in 1995 or after, you can simply add R134 refrigerant to the system to recharge it. If your van was made prior to 1995, you will have to retrofit it to accept R134 refrigerant. In some areas, where you need a license to buy refrigerant, you will have to go to mechanic to have the system recharged.

Things You'll Need:
* Gloves
* Safety glasses
* Pressure gauge
* R134 refill kit

1. Look at the air conditioning system on your Plymouth Voyager. You should check for damage or leaks. As you do this, keep an eye open for the Low Pressure Side port. This is located near the firewall on the passenger side of the van facing straight up. It has a blue cap on it. Remove this cap.
2. Turn on the van and start the air conditioner. Turn it on the highest fan speed and the lowest temperature. Use an automotive air conditioning pressure gauge to check the pressure. If the pressure is below 25 psi, you need to add more refrigerant. If it is above 25 psi, lack of pressure isn't the problem and you should have a professional check it out.
3. Read and follow the directions included in the kit so you can properly hook up the refrigerant refill kit to the Low Pressure Side port. The way you do this will vary depending on the type of kit and the manufacturer.
4. Add refrigerant until the pressure is between 25 and 45 psi. Pressure any higher than 45 psi can cause an explosion that leads to serious injury or even death so it is important to check the pressure often when you are recharging the system.
5. Detach the refill kit from the port following the directions of the kit. Put the cap back on the port. Failure to do this can cause refrigerant to leak out slowly.
6. Let the air conditioner run for 20 minutes so the R134 can evenly distribute through the entire system. This is especially important if you are using a kit that has the oil mixed in with the refrigerant.

The valves on both sides are serviceable, contrary to what is stated in the FSM.
The high-side port is repalceable as a unit: in is threaded into the fitting in the liquid line.
The low-side unit is a standard Shraeder valve, looking like a tire valve. It is threaded into the port.

Note that for the low-side, you can buy a tool that lets you replace the valve without discharging the system.

Hope helped.

Posted on May 04, 2010

  • 1 more comment 
  • ZJ Limited
    ZJ Limited May 04, 2010

    P.S. on the 3.3 / 3.8 the low-side valve is on the suction line above
    the compressor, high-side is on the right hand frame rail in the engine

  • ZJ Limited
    ZJ Limited May 04, 2010

    Please note, there are 2 refrigerant lines, one is small in diameter
    and one is larger in diameter, the larger line is the CORRECT line to
    inject coolant into. Never try to charge the smaller line because it is the high pressure
    line, it makes since, it is smaller so the pressure is greater.

    The larger line is the low pressure line and can be charged, always
    have the motor running and the air conditioner on when charging your air
    conditioner system or you will just let out refrigerant into the
    atmosphere which is very bad for the environment.

    1. Turn on your car and the AC and look under
      the hood for the compressor. The AC compressor is a pump-shaped item
      with rubber and steel hoses going into it. There is no filler cap, but
      it does have items that will look like valve stems as on a bike tire.
      There is a pulley at the front of the compressor.
      When the AC and
      the blower are on, and if the center of the pulley does not turn, then
      it means that the center of the clutch is not functional. Some reasons
      for this can be a bad fuse or a wiring problem. Another reason can be
      that the AC is low on refrigerant. As in most systems, there is a
      safety cut off option if the level of refrigerant is very low.

    2. Re-fill the refrigerant by locating the valve on the main
      pipe connected to the condenser. Open the valve and attach the refill
      kit to it the same way as you would attach an air hose to your bicycle
      tire when you want to fill it with air. Once the refill kit has been
      attached, release the refrigerant from your refill kit into the main
      pipe of the condenser.

    3. Release the refrigerant from your refill kit into the main
      pipe of the condenser. Locate the appropriate knob or switch, depending
      on the refill kit, to release the refrigerant. Fill slowly and
      carefully. You should never overfill as it will not improve the cooling
      but actually decrease the performance of your AC. Your car manual will
      tell you the exact pressure of the refrigerant that is required in your
      air conditioner for optimal results.

    Good luck.

  • ZJ Limited
    ZJ Limited May 05, 2010

    A vacuum pump is a piece of equipment that will allow you to pull a vacuum on your car's a/c system. They fairly simple and inexpensive to operate. First, turn off your car's air conditioner and shut the engine down. You don't hook the vacuum pump directly to the A/C system. You to first hook up a refrigerant gauge manifold set to the low pressure port on the system. (Generally, this is the blue hose that is attached to the gauges.) On your gauge set there is a port in the middle. This is where you connect the vacuum pump. Using a gauge manifold set allows to shut down the vacuum pump without losing the vacuum you have just created. If you just hooked the A/C vacuum pump straight to your air conditioner, you would lose the vacuum as soon as you unscrewed the connector from the port. With the gauges, you can measure the vacuum and add refrigerant to the system.

    Now, hook up your refrigerant gauge manifold set and screw on your A/C vacuum pump to the center port. When the vacuum reaches 27 Hg, let the pump run for another 30 minutes. Now, close the valve for the center port and turn off the vacuum pump. Leave the gauges connected to the A/C system and go take a 20 to 30 minute break. When you return, pick up the manifold gauges and verify there is still a vacuum. If in that time you have lost some of the vacuum, then there is a leak somewhere. If the gauge still reads 27 Hg, you are ready to add refrigerant.

    After you connect the center port of your refrigerant manifold gauges to a can refrigerant, start the car's engine and turn on the air conditioner. Now slowly open the low pressure manifold and let the freon flow into the system.

    Good luck.



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