Quote:
Originally Posted by ram_g
Apologies in advance if this is an insulting suggestion, but are you sure you have communication between your high side schrader valve and your gage set? What are the pressures with the engine off and the car having set for a while? Under these conditions the low and high side pressures should be the same as it will equalize in several minutes if nothing is running. If you see these same pressures then at least you would have positively answered the question.
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That has been a question in my mind as well. I suspect there is an issue with the Schrader valve, the R134 fitting adapter and the quick coupler on the high side. I have tested the gauges on two other cars (one with a similar adapter) and high side readings are normal. I agree that I should see equalization after shut down, but I don't. Just this evening I depressed the high side Schrader valve manually and a spray of pressurized refrigerant came out which tells me I should be getting a pressure reading. I suspect the pintel of the Schrader valve sits too low once the adapter is screwed on for the Coupler to engage it. Not sure what to do about that. It worked fine on the other car with a similar adapter I tested. Either there is an issue with this adapter or the wrong Schrader valve has been installed with a short pintel. I'll pick up a different adapter tomorrow.
H
