Wasn't implying that the inertia cutoff switch was the cause of your problem, was just suggesting that you bypass it, just because it can bite you at inopportune times, as we found out. It's not worth having it if you get stuck in the middle of traffic with the fuel pump shut off as happened to us a few times.
Good luck with your problem. You will get it solved. My mechanic had a Marelli(?) tester, which might find such a problem as yours. Pretty sure he used it on our 78 Alfetta sedan when we had some sort of similar problem. Don't remember what it was though. I remember his showing us the tester, saying that it did come in handy now and then. Don't know if anyone in your area has one. Evidently quite rare.
1989 Milano, Shankle Sport
1991 164S, stock
1994 164LS (~Q)
1972 Morgan 27
previously owned since 1964:
62 Morris MiniMinor 850, 67 Austin 1275 Cooper S (Downton 3/4 race), 64 Giulia Sprint GT (1st red one made), 72 Fiat 128 Sedan, 75 Alfetta Sedan, 78 Alfetta Sedan, 78 GTV, 81 GTV6, 86 GTV6
Last edited by Del; 04-05-2019 at 12:16 PM.