Getting back into the swing of Vanagon ownership after a relatively smooth
first year with Ragnar, but I really want to start digging in on some
troubleshooting and fixes.
Apologies in advance for anything dumb or obvious here.

Not sure whether these two things are connected...

* Rebuilt 2.1L WBX / Automatic

Symptom #1:
-On 1st start after not being driven for a day or more, idle *feels* a
little rough/weak, though it stays dead-on at 900rpm.
-Stalls out after idling for about 30-40 seconds (if I leave my foot off
the pedal).
-Also tends to want to stall after engaging reverse when pulling out of the
driveway. Typically when this happens, it's as I'm backing up, but today it
died immediately upon engaging reverse.
-Once it's been on the road for a minute or two, everything sounds/runs
just fine, and there are no more issues - until the next day when I go
through it all over again.

Note that I changed oil and filters (air/oil/fuel) a few weeks back, and
it's hard to tell whether that has made things any worse, but it definitely
hasn't helped.

I haven't messed with the idle switch (yet). I thought that since it was
idling dead-on at 900rpm consistently, this probably wasn't the issue...
(I'm wondering if it has more to do with the throttle body itself.)

Symptom #2:
-Today while going through all of this, the engine dropped out immediately
when I put it into reverse. The oil pressure warning light started blinking
immediately after I restarted.
I didn't want to push my luck, so I turned it off and walked away until I
had a better idea of what to look at.

Thank you!

*Matt*
Missoula, MT
'88 Westy, *Ragnar Loafbrick*