Originally Posted by THK
Before you go spending any money on parts and trying to fix a problem that you don't know about, have your friends shop perform an a/c performance test.
You might find that the orfice is clogged or sticking, or maybe a high or low pressure sensor is going bad or maybe a thermostat in the evap. In todays 134a systems, a couple of ounces either way can effect a/c performance. Running a performance test with the gagues connected might give you a clue onh whats happening.
Anyway, stop throwing money at it in the hopes that you might fix it. There is a reason the previous owner added excessive 134a to the system.
I appreciate the input but as to date I have only spent a total of 20.00 on trying to fix this. Mainly on gas from one place to the next...lol
The dealership actually quoted me 80.00 to analyze the complete system and I think its time to let these guys troubleshoot it as I cannot work on my truck with me having a heart condition and pacemaker. And no its not a HEMI but the battery life is awesome....LOL
Anyway, The shop manager sent me to his a/c tech and the tech said in his 25 yrs of working on a/c problems he has never seen but 2 EVAP sensors go bad. He's thinking more a weak clutch or as your one suggestion of the orifice tube being dirty and clogged...