Lotsa Cadillac wrenching today

[SuperSix]

44 degrees isn't bad. What were your gauge readings? 134 refrig is a toss of the dice on a conversion. Usually the size of the condensor and the air flow across it is most important. In most cases 134 doesn't cool as well as R12. You should have left it on the pump for at least 2 hours, the more the merrier. If you're getting 44 out of it though I'd let it go. Run it for awhile and see how it does on those extreme Fla. days.

Gauge readings (If I remember correctly) were ~30psi low, and ~250 high.

then whats the problem?  Fill to what the gauges show to be correct for 134A at your current temperature, fan on high, windows down.   Normally, it will be a bit over 40 psi on the low side and under 200 psi on the high side.....usual ly takes about 80-85% of what it would be with 12. (about 3.5 12 oz cans will be close as I recall)

If the switch on the accumulator is adjustable or was for r12, back it off a little ccw to lower the pressure at what it cycles the compressor. around 25-28 psi will keep it from cycling as often at idle.

Factory R12 is 38oz, so 80% is 31.4 oz. I am close.

It doesn't have an adjustable switch like the TR's.

[Steve Wood]

sounds like it...I figured all the gm stuff held 3.25lbs of r12....guess I am no good at figuring

[SuperSix]

One thing I might have screwed up - I used a regular AC Delco OEM replacement orifice tube, I didn't put in one of the red Ford ones. I have one, but it's for the GN.

[Steve Wood]

if it is that cold, it will be fine