> 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.

You need to get a vacuum pump and pull a vacuum on the system
before you charge the system with freon. Otherwise the system is
full of air.

Lynn