First, I haven't subscribed to this list in a while, so I don't know how to
get on the digest list - an anyone help?

Second, my '81 Vanagon has been having problems for almost a year now:
After it has been running for 1/2 hour or more (and especially after it has
been running, then stopped for gas or something, then started), it will
"stumble" while cruising along.  "stumble" means that the engine will lose
power for an instant (fraction of a second), which can be felt throughout
the bus.

Any clues as to what to look for?  Is this something I need to take to the
dealer (for their diagnostic equipment)?

I rebuilt the engine about 2 years ago, so hopefully there's no problem there!

Please copy any responses to ed@sun-valley.stanford.edu

Thanks,
Ed Wilson
ed@sun-valley.stanford.edu