1992 Chrysler Jeep Cherokee: A/C System Pressure is Same on Both High and Low?

In this condition the A.C cooling problem will be noticed.


The 1992 year Chrysler Jeep came with R12 from the factory.if Your jeep is using R134A, then it was converted.


It wasnt until late 1994-early 1995 that R134a became available.

the system calls for 38 ounces, but with R134A conversion, less is installed due to molecule differences in the refrigerant. The industry rule of thumb is 80% of called for. So for yours that will be 30ounces.

Ok, pressure should be 28-35psi on low side and 175-220psi on high side. If it were a restriction in the expansion valve, pressure would be high on the low side, but near normal on the high side.

Yours is neither sucking on the low side, nor pumping on the high side, hence the high low side pressure, and low high side pressure.

If you are positive of the system being at the correct level and compressor engaging, then only one thing causes this - weak compressor. It needs to be replaced.

So the compressor needs to be inspected and tested before getting replaced.

As per description it says compressor is faulty.

This will help.
Thanks.

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How to Perform Car AC Leak detection Test?

If you need dis-assembly or replacement instructions for any other auto/car part, or you want to ask question related to your car/truck jeep problem then please leave the comment with your details, so I can provide you the required instructions and solutions.

The procedure for AC leak detection test is as follows :-------

Leak Detection

Leaks can be found using several means. These include soapy water, internal dyes, and several types of special leak detectors.

Soapy water is made by mixing water and soap to a thick solution that can be applied with a small brush. If the leak is large enough, soap bubbles will appear.

Soap bubbles showing a leak in a hose. Courtesy of Best Educational Trainers, Inc.

An internal charge detection method includes injecting a coloring agent into the low side of the system. Some red dyes are available in pound-size refrigerant containers. The dye is harmless and will be left in the system after the test. If dye leaks out, it will be visible at the source of the leak. A problem with the red dyes is that they can leak onto interior carpet and cause a damaging stain. If there is a leak, the dyed refrigerant will have to be recovered for reuse.

Another dye method uses fluorescent dye. A black light is used to locate the leak.

A fluorescent dye is added to the system before checking for leaks with a black light. Courtesy of Tracer Products, Westbury, NY.

This method is very effective on difficult leaks that only happen during the vibration that results from driving the vehicle. The dye will pinpoint where it leaked. The system is charged to at least 10% capacity for either test. This is so the system can develop normal operating pressure. There should be at least 50 psi static pressure (when the engine is off).

Electronic leak detectors are the most popular ones used today. Many of them work on both R-12 and R-134A refrigerants.

An electronic leak detector that works on both R-12 and R-134A refrigerants.

The tester nozzle is moved around the various joints in the system. The probe is held at a distance within 1/4" of the joint being checked. When a leak is found, the tester lights up and its slowly pulsing, high-pitched horn or clicking sound becomes more rapid. The tester has a sensitivity adjustment. You can adjust it so that it just stops ticking. When it starts to tick you have found a leak. The "gross leak" position can find leaks of 4 ounces per year. The sensitivity in this position is less so you can locate the exact source of the leak.

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This details will help.

Thanks.

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For car AC related and Heater related solutions. You can refer the options mentioned below:---

Car AC Blows Warm Air ?

http://technoanswers.blogspot.com/2011/10/car-ac-blows-warm-air.html

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http://howtobyme.blogspot.com/2011/10/how-to-test-auto-ac-pressure.html

AUTO Air Conditioning Troubleshooting?

http://technoanswers.blogspot.com/2011/10/auto-air-conditioning-troubleshooting.html

AUTO A/C COOLING PROBLEM?

http://technoanswers.blogspot.com/2011/10/auto-ac-cooling-problem.html

Fixing refrigerant leak?

http://howtobyme.blogspot.com/2011/10/how-to-fix-refrigerant-leak.html

How to locate Car AC Refrigerant leak?

http://technoanswers.blogspot.com/2011/10/how-to-locate-car-ac-refrigerant-leak.html

CAR AC INTERMITTENT COOLING?

http://technoanswers.blogspot.com/2011/10/car-ac-intermittent-cooling.html

What causes INTERMITTENT COOLING on Car AC system?

http://technoanswers.blogspot.com/2011/10/what-causes-intermittent-cooling-on-car.html

Car AC making Noise?

http://technoanswers.blogspot.com/2011/10/car-ac-making-noise.html

BAD ODOR ON CAR AIR CONDITIONER?

http://technoanswers.blogspot.com/2011/10/bad-odor-on-car-air-conditioner.html

How to Recharge Car's Air Conditioner

http://repairhelpcenter.blogspot.com/2011/10/how-to-recharge-cars-air-conditioner.html

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