Alright guys, my AC S500 is blowing hot air in this hot summer. The evaporator temp is over 90F during the day. I plan to inject refrigerant dye in there to see if I can find the leak. Is this the plan?

Any good hearted DIYer out there to guide me? Any help is appreciated. Thanks

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93 Toyota Corolla 177K
95 S 500 coupe 82K
92 400E 180K (SOLD)
94 E 420 150, blown gaskets (SOLD)
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