How can you tell if a 1994 Pontiac Grand Am uses R12 or R134a freon?
There should be a sticker under the hood indicating whether it uses R12 or R134A. Unfortunatley a lot dont. The only way to tell is by the high and low side fittings. R12 fittings are bothe the same size. R134A has two different size fittings where one is larger than the other, ussually the high side fitting is larger than the low side.
It depends on the year of the car. From 1994 on, R134a refrigerant is used. Prior to that, they used R12 refrigerant (Freon). R134a is technically not "Freon". Be alert, however, as many older cars (like my 1986 Camry) have been retro-fitted with R134a systems, and can no longer accept Freon, as the two refrigerants are not compatible.
The 1997 Pontiac Grand Prix GTP will use R-134A. Cars prior to 1994 used R-12, and after 1994 all cars were equipped with R-134A. The reasoning for this is because R-12 refrigerant contains CFCs (chloroflourocarbons) which deplete the ozone layer, whereas the more modern R-134A does not contain CFCs. Hope this helps!
Modern auto A/C sytems use R134a refridgerant not freon or R12. Add refridgerant to your system by accessing the "low side" fitting. It is located on the accumulator/drier near the firewall on the passenger side. The high side is near the battery on the driver side. There is no way to get them mixed up because the fittings are different sizes.
Your 1994 Mustang doesn't use freon. It uses R134A refrigerant. Any automotive store should be able to assist you in finding the low pressure port and the materials that you would need in order to check, and recharge your system. If you should continue to have problems seek professional help. STRENGTH WITH HONOR JOE
None. All cars produced after 1994 use r134a in their a/c systems instead of r-12 (freon). Your car should have a sticker under the hood somewhere that details the amount of refrigerant in the system, although when you charge an ac system you are not measuring the amount of refrigerant, but rather the pressure. You can get a can of r134a and a reusable charging manifold at a car parts store for about 20 dollars…