Sorry, forgot.

I have a 1984 300SD.

I have been having problems with the AC since I bought the car. I put a can of leakstop in and it seamed to work but the pressures are way off.

I get over 300lbs on the high side with 45lbs on the low side. That is the only way I can get it to cool.
If I drop the low side down to 30lbs it will take the high side down to about 270, but it won't cool hardly at all at that pressure.

Also, the compressor runs continuously, it never stops.

I did notice some oil on the TEV valve if I can't tighten it I will replace it but I think the ETR valve may be causing problems also.
I guess I should just replace that too at the same time. They are both fairly cheap to purchase on line.

Thanks

Danny