I have a 98 Ram SS/T with an AC problem. Holds charge for a few days only. I tried the dye method and electronic sniffer but found no leak. I then filled system with Nitrogen (on low side port only) and can't find any leak under the hood. I'm thinking it's an evaporator leak in the dash.
So:
1- Do I need to repeat the last test hooking up Nitrogen tank to both and low side ports?
2- Is there a trick or a method to test the evaporator before tearing into it?
Thanx guys.