Thanks Scott - as always I appreciate your advice.

Admitedly, everytime this has happened it's been in a situation where I
cannot take the time to do a lot of detailed checking of things.

I do not know about the idle switch getting good contact for sure - so I
guess all bets are off as you say. Still when things are dry the bus runs
like a champ - would wetness effect that?

I know the fuel tank has crud in it - and needs to be resealed (a job
planned when winter breaks). But again when things are dry - no problems. So
it's possible I guess water could be getting into the tank if it's that bad
- but that maybe seems a stretch - or maybe not.

I have run it without the O2 sensor - has no effect at the time.

I've checked the grounds - but may have missed some - I want to replace the
old ground strap.

With my limited knowledge and the fact that I don't see an easy way to
"recreate" the issue - it's been tough for me to figure out.

--
Thanks,

Jeff
'85 GL (Gertie)
'90 Carat (Grover - the noble parts donor)
'86 (We call this one Scrap)
'78 Bus (Melissa) Patty's Bus