Tom,

Thanks for your info. I called Bombardier tech support. They are
actually pretty good to deal with; no wait on hold.
You get directly connected to technical folks.

They suggested that either
the fuel pump diaphragm was leaking (#1 possible cause)

or that the TPS was screwey (much less likely).

The leaking diaphragm would however make it run fast after
the engine was sitting...just the opposite of what I see.

I will check the fuel lift pump vacuum lines. If they
are full of fuel I will have my culprit, if not I will probably
button up the motor and go fishing.