We took our ’87 Ford F-250 to an A/C shop that had R-134a adapters, which also fit our smaller R-12 ports. On our truck, the high-pressure side port was located on the driver side, inline ...

The typical '86-'93 Mustang R-12 A/C system sees dash-vent temperatures in the 40- to 42-degree range on fan speed one. However, when a basic R134a conversion is done (a simple change of ...

Looking online, the conversion from R12 to R134a is 3.25 pounds. I suspect you have a leak. Perhaps try a DIY can of R134a with a dye and sealer and see what happens. You may stop the leak, or the ...

R12 systems weren't designed for anything but R12, so if you're converting one to R134a, then you have to put in about 25 percent less refrigerant to account for R134a's higher operating pressure.

In contrast, cars sold after 1992 that are charged with R134a have threadless snap-on quick-connect-style fittings. When you convert from R134a, you’re supposed to install R12-to-R134a adapters.

Looking online, the conversion from R12 to R134a is 3.25 pounds. I suspect you have a leak – try a DIY can of R134a with a dye and sealer and see what happens.