1994 Cougar XR7 DOHC/5-Speed
Our cars use an orifice tube, not an expansion valve. But yes those cans are junk, you’re putting air into the system through the hose
The right way to do it is to have the system fully evacuated and the have the correct amount of weighed refrigerant put back in, eg take it to a shop.So then, what options do I have?
My A/C functions, but it's not very cold.
I mean if you "top it off", there's no way of knowing how much refrigerant is left in the system to know how much weight to put in from the 12oz can(s). Doing it the right the system needs to be fully evacuated, legally and ethically requiring a visit to a shop to pull it one way or another, from there you can do it yourself using all that stuff to refill after finding/repairing the leak source.