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Low side pressure too low at 40-50 MPH

jvel2012 on Sun September 09, 2012 4:56 PM User is offlineView users profile

Year: 2005
Make: Toyota
Model: Sienna
Engine Size: 6 cyl
Refrigerant Type: 134
Ambient Temp: 90
Pressure Low: 40
Pressure High: 250
Country of Origin: United States

The ac works great if you don't go out for a drive.
The car at idle will operate great. But as soon as you
take the car out on the road and get it up to 40-50 miles
per hour, the low side pressure drops to 20-25 psi and the
compressor stops. It takes 20 minutes before compressor
will come back on. I think the evaporator is icing up and the
compressor won't come back on until the evap thaws out.

That is my problem. something is happening when I get up
to 40-50 and low side pressure drops.

Dougflas on Mon September 10, 2012 7:47 AM User is offline

Reclaim the charge and recharge to the proper amount.

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