Phil,
What you say jibes with what I see:
a) That plugged hole where the thermal timer should go looks like it was cast that way, not as if it were drilled out and then replugged.
b) The two white wires going to the cold start injector appear to go into the fat harness with all the other white wires that go to the ECU.

What really got me wondering was that the Haynes diagram for the 142, which, btw, is not date specific, shows the wiring for the TT+CSV as a circuit activated through another white wire from the starter. They don't show any tie-in with the ECU except for a white wire going from the starter to the ECU, and I don't have enough electrical smarts to know if that represents the way the ECU controls the TT+CSV.

No, I didn't think the stalling was related to the CSV. That was simply a matter of no fuel coming through for some other reason I've not yet got to the bottom of. Plenty of fuel coming through now -- temporary bad electrical contact to fuel pump perhaps. I was on a potholed dirt road, so lots of bounce. It did momentarily cross my mind that an over-active CSV could have caused flooding when I tried to restart, but pulling the fuel feed hose showed that the problem lay elsewhere.
Thanks for the input, you too Michael and anyone else who might yet pitch in.
Bob S.