Damn. That is the same engine I have, and it is solid as a rock.

I cannot make any specific comment on this problem with this engine.
However, in the past when I have had this kind of problem, it has been
spark related.

Have a look under the hood and make sure that all connectors are in
place and plugged in.

Use Google and read teh FAQ for this newsgroup. It wil tell you how to
use the ignition key to activate the feature for reading the codes
from the "Check Engine" light, it will tell you how to read the codes,
and then you can cross reference the codes you read to the list of
codes in the FAQ to get a starting point (hopefully). In this vintage,
not all problems actually set codes in the computer.

Beyond that, I really think you are best off getting it to a shop that
has the proper diagnostic equipment. It sounds like it would be
something simple to fix, but it may not be simple to find.

hth