as far as I know, R12 and R134a are not interchangeable. Unless you do a
crapload of changes in the AC system.

t

LostInEwing@gmail.com wrote:
>I have 91 Honda CRX. Tried converting the R-12 to R-134a ac system.
>I got some freon into the system, however it is not cooling down
>significantly. I have the same problem for an 88 cadillac deville,
>4.5L. . I did the following for both cars. While car was running
>evacuated what remained of the R-12, within a few seconds. Then
>reversed the procedure and recharged the system, with the ac running
>on high. For some unknown reason it only takes less than 12oz
>[5psi]? Any suggestions will be helpful. Why will it not take
>anymore or get colder.

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