Engine Size: 4.0
Refrigerant Type: R134a
I looked at a 03 explorer yesterday that had about 15psi of compressor flutter on an antiflutter gauge (at about 220 psi). From my experience this is a compressor problem. As I've never worked with a scroll compressor and the parts catalog says this unit could be, I just want to make sure that this is not typical. Flutter is always bad, correct?
Expect some on a scroll compressor. They eject gas only once per revolution. It's a thumpa thumpa effect especially at idle.
On a multi-cylinder compressor it could indicate a bad valve on one of the cylinders, but you'd need to compare to a known-good compressor of the same model to decide how much "flutter" is bad.
It's normal - from the ford manual:
NOTE: Vehicles equipped with Visteon fixed scroll A/C compressors may experience rapid refrigerant high side pressure fluctuations upon cold startups and/or after refrigerant system recharges. These high side refrigerant fluctuations are characteristic of the Visteon fixed scroll compressor and not an indication of a failing/failed A/C compressor.
Hey, can you do me a huge favor?!?!
On your truck, when the ac is on and engine idleing, does your high pressure hose with the port on it vibrate? If you put oyur hand on it do you feel a pulsing/thumping?
It would really help with my problem on my truck.
Thanks for the information. This isn't my vehicle, but I expect to see it back in a couple weeks to try and trace a leak. I'll let you know then, if it's not too late.
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