Originally Posted By: kschachn
Originally Posted By: mjoekingz28
In some of the cars Ive driven, if The rpms get (and stay) below a certain point, AC performance is lousy and you sweat. If you sit in traffic and rev the motor or select a lower gear when riding the neighborhood streets then you get cold air.
Is this explanation satisfactory?
No, you said that driving around with the compressor off at first would cool down the car faster. Then you brought up the decrease in performance at a stop as an explanation. I was referring to how these two were connected.
Actually that was pretty true. My 81 Corolla had ice cold a/c when driving.
at stops, the compressor wasn't cutting in very often or for long.
I located a 'black box' under the dash, attached to the heater box.
there were 2 control pots in there.
1 is black,
1 is red,
the red one turned down allowed the compressor to kick in, and stay engaged longer, in drive, at a light.
in other words, you could control the length of the cooling cycle, how long the compressor stays off.
Btw this was at 210k miles. Good ol' R-12 and a new fan clutch.
On the Lincoln, I roll the back windows down, put it on normal a/c for a couple minutes
then hit max a/c and start rolling up the windows.
Guess the japanese method is good, if you have a few minutes to look like an OCD freak..