Originally Posted by knight75
I'm a newbie here but I need help with my Ac on my 1991 ranger 2.3. I changed it over to 134a a few years back. It had stopped blowing cool air then and when I charged it it worked fine and was blowing cool. I was proud of my self. I shut the truck off and the next morning no cool air. I gave up and a few years later I decided on buying some 134a with leak sealer and tried again. This time cool air again so I got in and took off down the road just to hear something like a bottle rocket going off and I could see a stream of white smoke blow out and up out from under the passenger side of my truck. I'm guessing I have an o-ring leak or something is causing the blow off valve on my compressor to malfunction? I bought me a can of 134a with dye in it. Thought about trying it. But its just getting hotter and hotter outside.
Any ideas what it could be?
If the refrigerant leaked out that fast, you shouldn't need dye to locate the source.....it should be real obvious.
I know nothing about compressor high pressure relief valves but if the high side pressures are too high, look for restricted air flow through the condensor. Since you added 134a once you should know what the pressures are.
My guess is a ruptured line.