This may be the exact problem with my A/C. Larry helped me recharge the system after I converted it back to R-12, but the (new) compressor did not make enough pressure to cool adequately. Is it possible that I have too much mineral oil in the system? Would the symptoms be similar?

As I was attaching the new compressor, some oil spilled out of the unit, but I was unsure of the amount. When I had it all back together, I added an amount of oil that I THOUGHT approximated the lost amount. I may have gotten WAY too much back in, thus exceeding the 8 oz. recommended. If so, would the result be as I described above, i.e., low high-side pressure?

Side note: The last thing I did to the system before charging was to remove the R-134 fittings and insert valve cores. When I did this on the high side (the fitting is at a low point), some oil came rushing out. Would this be normal?

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Matt
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1995 E300 Diesel (Die Blau Frau)