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What is my problem ? Help please!

stevey88 on Thu June 11, 2009 11:53 PM User is offline

Year: 1995
Make: VW
Model: Jetta
Engine Size: 2.0
Refrigerant Type: R134a
Ambient Temp: 70
Pressure Low: 75
Pressure High: 75
Country of Origin: United States

When the engine is stopped, both high and low side has 75psi. When the engine is running, low side drop to 40psi but there is no change to the high side reading. Is something blocking the high side line ? The dryer ?
Thanks in advance for any help.

mk378 on Fri June 12, 2009 10:47 AM User is offline

That car has a variable-displacement compressor. It could just be undercharged, as variable compressor systems do unusual things when undercharged. If it still does the same thing after evacuating and recharging by weight, it appears the compressor's variable displacement system has failed, which is rather common. Replacing the entire compressor is the usual cure.

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