Toyota Repair: 1993 Terxel A/C leak, electronic sniffers, mr ted

Question
Mr. Ted
I have a 93Tercel, 140,000 miles, automatic that leaks a can of R134 a day.
We have used 2 different electronic sniffers trying to find the leak and have not been able to locate the leak. Any ideas?

Thank you

Jack

Answer
A leak this large should be obvious, was it checked for a leak inside the passenger compartment?
This should be done with the engine off/AC off and the fan turned on to medium speed, use the detector at the vents, if there is a leak at the evaporator core it should pick it up.