Engine hiccups after a/c service, 'adaptive engine management' and a/c fault codes

["AMZ" <amz@eskimo.com>]

First of all, thanks to those who suggested WalMart as a source for
inexpensive freon.  The reason my compressor wasn't kicking in was that I
only had .31 lbs. in there.

After the mechanic spent about 10 min. looking for the HI connector,
everything went smoothly and my car passed the vacuum test.  Post service
temp was 50 degrees.  He felt it should be colder for the readings on the
freon machine, so he unhooked the car battery for 10 sec. to "clear the
settings" in the climate control. This didn't seem to help, but anything is
better than the non-cooled air I had.

Anyway, he said I might experience a "bit of a rough ride" for 15 mi. or so
until the "adaptive engine management" re-learned my driving.  Well, it's
been 50 miles and my engine seems to have a slight hiccup every so often
when cruising along on the highway (especially 40 - 60 mph).  I'm not
positive, but it seems to be more frequent when a/c is on.

Also, I the air flow seems to be intermittent through the center dash vents
when on AUTO/LO temp/HI fan.  It'll blow wonderfully for a few miles, drop
to the same as LO fan volume, then suddenly kick back in.

1. What is this "adaptive engine management" or was the guy blowing smoke?
2. Is there a solution shy of getting a tune-up?  Bear in mind that I'm not
mechanically inclined.
3. Though I've searched and (*think* I've) found some information on the a/c
fault codes in the archives, it doesn't seem quite right.  I also only have
the (supposed) channel designations, but no indication of what the "normal"
settings should read.

Thank you in advance for your assistance.

- Andrejs

'88 5ksq