Okay, I live in Texas, it gets hot here. Recently noticed AC can't keep up in heat of day. Temp reads 50 at vent, 80 to 85 inside car, this is with ac at max fan/max cool. Took to repair shop, of course early in am, temp at vent is 40, inside car is 70. Anyone have any similar problems or suggestions as to what is going on?

 

it's very hard to help you with out the a/c pressure readings , tool need call a/c manifold gauge to retrieve pressure reading , also make sure the a/c compressor clutch its engage when a/c it's turn on , toyotas are now for bad magnetic clutch relays.

 

I would suggest get better air conditioning, replace the old one.