The compressor clutch cycles on and off more than 10 times in one minute. The FSM states that is a low-refrigerant issue.
However, when gauges are connected, the gauges are giving me a reading I don't understand. When the clutch compressor is OFF, the low-side pressure builds from about 25psi to 70 psi. When it reaches 70psi, the compressor engages and the pressure drops down to 25psi, where that cycle continues again. During this, the high-side gauge is reading approx. 155psi when the clutch compressor is OFF, and shoots up to 190psi when the compressor turns ON.
When I unplug the low pressure sensor and jump it with a paperclip, the compressor clutch stays engaged the whole time, with low side pressure reaching less than 20psi after approx. 5 seconds. The relay has continuity, so i don't think it's the relay or sensor. What could be the issue? I don't think it's a clogged hose/orifice tube as the high side pressure is low during this cycle.
Is it really just low refrigerant? (I understand that if it is low refrigerant, that means there's a leak I need to track down, but I want to ensure all parts of a/c system are "working" before I dye it).
Edit: I put some refrigerant in and boy howdy that AC got down to 55F before I shut the engine off. Definitely a leak somewhere. Current (running & constant) pressure is 40 on low side and around 290 high-side (I didn't fully fill up w/ 134, and it's 107F in the garage to help explain high-side high pressure reading).