I have a 87 190 Dt. I've read several post after the fact about not converting to R-134.

My problem is that it only cools when the vehicle is moving or at high rpms; once you slow down it quits. Is this from changing to R-134? The compressor is running the whole time.

Has anyone converted back to R-12. I used a DIY kit that said the R-12 and R-134 oils could mix. Will it work going back to R-12?

Any help is appreciated. Thanks!!!