I have fixed the AC in my 1995 Ford Crown Victoria 4 times in the last 3 years. I replaced the compressor with a rebuild last year to have it stop functioning in 1 week. Did again with the condenser and got thru the year. System worked thru most of the winter, defrost, but as soon as it started getting hot it was no more.
So I'm pulling out all the stops. I bought a 4 cfm vacuum pump, Robinair. That should do better than the antique my housemate has. I bought a 3 lb tank of R134a. A digital scale. And a bottle to attach to an airhose and wash the pieces I'm reusing.
I have a new condenser, a new compressor and a new accumulator/dryer. I have cleaned the evaporator, all the hoses and installed new parts. Changed all O-rings. Added oil. Vacuumed for one hour and now will add gas. Will vacuum again before adding gas. Don't have a vacuum gauge but I think I've spent the budget so far this year.
Can I use this new type of orifice tube that is said to help unit not over tax engine that is on idle a lot? I have one made by 4 Seasons. It seems that it has a tiny spring in it or some how adjusts under low RPM when pulling power of compressor is not high. Some one called it an orifice tube that thinks it's an expansion valve. Will use orange tube, stock, if this is just another "snake oil" item.
Anything I've missed? Thanks for any help.