gto78
Well-Known Member
- Joined
- June 18, 2006
- Messages
- 123
- Reaction score
- 0
- City, State
- stuart, fl
- Year, Model & Trim Level
- 98 EB 2wd v-6
I was servicing my a/c system with the snap on recycle machine and noticed that it was 100% impossible to read the high pressure gauge. The needle was bouncing the entire range of like 20 to 300 psi so fast that you couldnt read it. My determination was that after 147K miles the compressor had finally broken some valve internally. Well during my timing chain project I decided to change the a/c compressor with a brand new unit, not rebuilt. I serviced it with oil and charged per the maint manual. Started it and everything was perfect, for about 30 seconds. Then the high pressure needle started to bounce slightly. A minute later it went a little berzerk. Now it's unreadable and the compressor is making noise, the factory one was still silent after almost 150,000 miles of constant use. I only put about 20 miles on the new compressor. WTF?
Is it possible that the orifice tube will cause a reading like this? I work on airplanes, not fords, and airplanes use plain old expansion valves that you can manually adjust. They open and close slowly, and I've never once in ten years seen a high pressure gauge do that. My guess is that the new compressor is designed the same as the old one, and possibly broke the same way. Maybe I did something wrong while servicing it? I dont have a clue, any ideas?
Is it possible that the orifice tube will cause a reading like this? I work on airplanes, not fords, and airplanes use plain old expansion valves that you can manually adjust. They open and close slowly, and I've never once in ten years seen a high pressure gauge do that. My guess is that the new compressor is designed the same as the old one, and possibly broke the same way. Maybe I did something wrong while servicing it? I dont have a clue, any ideas?
