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The low side pressure was over 120?
That definitely sounds like an orifice tube issue.Do you plan to replace it yourself?
Sorry, took a second to get a diagram pulled up. The orifice tube is inside the ac line:
You will need to evacuate the refrigerant first of course.
The evaporator tube is right above the receiver dryer and comes from the firewall.
Please let me know if you need additional help.
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Your question has dropped to my timed out list.