[kuehl]

Official TSB 9501 for R134a conversions

944, 83-85/1 is 1020 grams or 36 oz

944, 85/2 + is 860 grams or 30 oz.

9 times out of 10, if you have an issue getting in the specified qty of R134a and all components are working properly (compressor, TEV, condenser and fan) the issue is 'air' in the system.

And, 99.99% of the time if you have air in the system its because the vacuum was inadequate; that means vacuum pump, vacuum oil, system leaks, analog gauges, not following procedures, not understanding procedures, etc.

The other .01% is the 'unknown'.