CGT strange stalling behavior

[Craig D. Niederst]

I finally had our '86 CGT running well after a clutch/tranny replacement,
new rear shocks, new tires, alignment and doorhandle. A new issue came up
yesterday. Car was running and driving fine, but on a 3-2 downshift, the
engine sputtered and died when gas was given. Pulled off the road, and
refired the car with no problem. But when the car is put in gear and given
gas, the car sputters and dies. My brother had to have the car towed home. I
briefly checked the car over last night. It fires right up, and when given
gas when in neutral, revs just fine. But when I put the car and gear and let
out the clutch, she immediately sputters and stalls. When I had the car at
my local Audi wrench for an alignment, they had a problem getting the car
started. They replaced the hall sensor (at ~$100 just for the part w/out my
permission!) and then had no problems (I had never had a problem before or
after either). Besides that, I have not done any engine work on the car of
late. Any ideas? TIA.

Craig
'92 100S (92k)
'86 CGT (198k)