[V8] Speed sensor problem?

[Ingo Rautenberg]

Let me preface with the fact that temps here have been in the low 90's this
week and high humidity.

So we had a heck of a downpour here yesterday to the point where the storm
drains couldn't handle the water and after driving through a few of these
roadway "ponds," I pulled over and waited out for the waters to subside.
About this time my car began exhibiting rough running conditions, or more
accurately, bogging-down.  So I checked my previous boging-down culprits
(dist caps, TP sensor, etc and all showed no signs of water.  Occasional
bogging down on the way home.  Every time, I shut the car off (if it hasn't
already stalled), it starts right up.  So I think water ingress somewhere
and hopefully gone by morning.

Not so.  Symptoms persist throughout the day.  I bring the V8 5 speed to my
local Audi guy and he hooks up the VAG-COM and nada.  Test drive it and no
problems.  Return to work and then attempt to leave a few hours later.  She
starts fine, but immediately bogs down and stalls.  Happens a few more times
and I immediately remember the bottle of cold water on the sensor trick
(though used for the crank position sensor for no-start problem IIRC.  And
it worked.  No problems all the way home.  So sounds like heatsoak/bad speed
sensor to me.  Whattaya think?

Ingo