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High Side Too High???

Shepherd777 on Mon June 06, 2011 11:58 AM User is offlineView users profile

Year: 2007
Make: Dodge
Model: Nitro
Engine Size: 3.7 L
Refrigerant Type: 134a
Ambient Temp: 72
Pressure Low: 48
Pressure High: 275
Country of Origin: United States


I put the gauges on my buddy's above Nitro after he complained of no cold air.

The low side was 30 or so, and the high side was like 250.

I added approx. 1/2 a pound of 134a, and I got 48/275 at idle.

I am not too familiar with modern cars, but the high side seems way high to me.

Anyone know what pressures we should be shooting for with this car?

Thanks.

mk378 on Mon June 06, 2011 12:48 PM User is offline

Seems to be overcharged now.

Running 30 / 250 ought to be making cold. Were the lines getting cold? If so it's not a refrigeration issue.

TRB on Mon June 06, 2011 1:16 PM User is offlineView users profile

A/C PERFORMANCE TEMPERATURE AND PRESSURE
Ambient Air Temperature 21°C
(70°F) 27°C
(80°F) 32°C
(90°F) 38°C
(100°F) 43°C
(110°F)
Air Temperature at Center Panel Outlet 7°C
(45°F) 7°C
(45°F) 13°C
(55°F) 13°C
(55°F) 18°C
(64°F)
Compressor Inlet Pressure at Service Port (Low Side) 138 to 207 kPa
(20 to 30 psi) 172 to 241 kPa
(25 to 35 psi) 207 to 276 kPa
(30 to 40 psi) 241 to 310 kPa
(35 to 45 psi) 276 to 345 kPa
(40 to 50 psi)
Condenser Outlet Pressure at Service Port (High Side) 1034 to 1724 kPa
(150 to 250 psi) 1379 to 2068 kPa
(200 to 300 psi) 1724 to 2413 kPa
(250 to 350 psi) 1999 to 2689 kPa
(290 to 390 psi) 2413 to 2965 kPa
(350 to 430 psi)




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Shepherd777 on Mon June 06, 2011 2:16 PM User is offlineView users profile



Thanks mk378 and thanks TRB for the real numbers.

Yep, we're way high on the low side now.

Any suggestions? Should we just evacuate and fill with the correct amount?

Thanks again.

TRB on Mon June 06, 2011 5:39 PM User is offlineView users profile

It's always good to have a base to start from.

-------------------------

When considering your next auto A/C purchase, please consider the site that supports you: ACkits.com
Contact: ACKits.com

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