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Doesn't seem to be cooling as it should

Rooftop-Special on Wed July 30, 2008 4:15 PM User is offline

Year: 2000
Make: Chevy
Model: Metro
Engine Size: 1.3L
Refrigerant Type: 134A
Ambient Temp: 100
Pressure Low: 40
Pressure High: 275

I had the compressor and accumulator replaced after the bearing on the compressor crapped the bed. Before the bearing went out, if I remember correctly, I would get about 58 degree air on the freeways here in PHX. After the shop replaced the comp. and the accumulator I'm only getting about 68 degree air on the freeway. I've been told that I should be able to hang meet in this sucker when charged right.

My buddy says it might be charged wrong, after putting his gauges on, the high side was at about 275, and the low side 40.......this is at about 2000rpm.

Do you think it's charged wrong? Any help would be greatly appreciated.



TRB on Wed July 30, 2008 11:28 PM User is offlineView users profile

With our current ambient you may not be that far off. But pressures do seem a little high for that RPM.

Compressor Type Nippondenso 10-Cyl.
Refrigerant (R-134a) Capacity 17.6-21.1 ozs.
System Operating Pressure
High Side 185-228 psi (13.0-16.0kg/cm2 )
Low Side 29.9-46.9 psi (2.1-3.3kg/cm2 )
Specification is with ambient temperature at 80°F (27°C), relative humidity at 50-70 percent and engine speed at idle RPM.


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Edited: Wed July 30, 2008 at 11:28 PM by TRB

Cussboy on Thu July 31, 2008 9:32 AM User is offline

You're in Phoenix? Yeah, it's been hot here lately (it always is), take it in to AMA for check/service. Good to have "another pair of eyes" to look at a problem. If you make an appointment they may do the service while you wait.

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