76 Scamp A/C

Pete in NH said
Well, I guess that old RV-2 came back to life! If you are really getting 30 degree air out of the vents, the evaporator is going to freeze up. It's kind of hard to believe it's really getting that cold with only 12 oz. of R-134A. What are you measuring the vent temperatures with?

Did you put the EPR valve back in? If not you will need to put a cycling switch in to measure the evaporator temperature and cycle the compressor clutch to keep it from freezing up.

Yes, it definitely came back. I have one of those little thermometers that you stick in the vent to measure the temperature. For ice, yeah the whole thing was covered in it last tonight. Today that it's hotter, it's only getting down to 50 at the vent, but that's a ton better than the outside temp. I did leave the EPR out and I do plan to put a cycling switch of some kind on it, but first I want to see how it does as is. It currently doesn't get driven more than around the block and let sit and idle because there's no insurance or plate on it, but that's going to change in a few weeks. I also hooked up all of the vacuum lines today so the heater is working again as is the EGR valve. I don't think it's all that important for something this old, but I'll see if it makes a difference since I had been driving without it. And I must say, it feels like a whole different car driving with the windows up and cold air coming from the vents. The last chore of the day was replacing the sending unit it the tank. I had bought a new one maybe three months ago and just did it today. The original had the float full of gas and the electronics or whatever in it were shot as well; resistance was all over as I was moving it. So, new one in, took it to the gas station (it wasn't far) and watched the gauge slowly come up as I was filling it. Now all that's left is all of the rust and a carb kit since it's leaking.