Thread: Any A/C experts out there?

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Stu Cool,it's been almost 6 yr's.since I've done any AC work and even then I never did auto ac,but it sounds like you have either a bad metering device or a restriction somewhere.Denny is right,the comp.is working because of the pressures but a metering device that is closed or a restriction will cause low suction/high head. I have forgot about 90% of what I knew simply because I don't do the work any more but taking for granted that this compressor has a good suction valve then look for a plugged filter/dryer,etc., or closed metering device.I know so little about auto ac that I don't even know what type metering they use but your high side pressure isn't making it thru or another possibility would be an overcharge combined with too big of a condenser or way to much condensing airflow.Hope this helps.
And after reading your thread again,,,if you are using an aftermarket 134 system with part of an old R12 system then that may be a mismatch of system components there(such as coil size;cfm requirement;etc.,,)???But if not then look for a restriction.