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A/C Refill Problems

wildfire111 on Mon September 13, 2010 5:05 PM User is offline

Year: 2001
Make: Isuzu
Model: Rodeo
Engine Size: 3.2
Refrigerant Type: 134-a
Ambient Temp: 85
Pressure Low: 82
Pressure High: 82
Country of Origin: United States

I'm interested in purchasing a low mileage 2001 Isuzu Rodeo from a friend and without working a/c I'm looking at a pretty good deal, although I'm a little nervous since I don't have much a/c experience. I brought the car to my shop during the test drive and put on a set of guages. Both low and high started at zero. Upon hooking up a can of 134-a and letting things run for a while I reached a low side of 80 psi and a high side of 80 psi. The clutch does cycle on and off with the a/c switch on the dash, but it is not cycling by itself otherwise and the whole system seems unwilling to pull in even one full can of freon. Any suggestions?

tomw on Fri September 24, 2010 12:18 PM User is offlineView users profile

Starting at zero means the system was full of a specific gas mixture, air. If it held any refrigerant, it would have the specific pressure for ambient temperature for that refrigerant. If your hi and lo pressures remain equal with the compressor engaged, the compressor is not compressing or you have no orifice restricting the flow internal to the system, either OT or TXV.

simplificate and add lightness

Chick on Wed September 29, 2010 10:14 PM User is offlineView users profile

Is the suction line going back to the compressor cold or cool? if so, try another set of gages.. if the compressor pressures don't change when the outer hub is spinning, you have a bad compressor....
Oh, and did you pull a deep vacuum and let the vacuum pull in as much as it could, then close the high side valve????

Email: Chick


Freedoms just another word for nothing left to lose

Edited: Wed September 29, 2010 at 10:16 PM by Chick

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