Since the last time I used it, two weeks ago, the only thing that was done was to change the gearbox gaskets and seals and new clutch, and I brought it driving from the workshop without problems, it started perfectly.
Maybe the voltage regulator is wrong, I could start there, the problem is that the car doesn't start and I can't make voltage measurements with the engine running, it's as if the spark plugs don't get current, at least that's what it seems.
Everything is original, the alternator is from the year 70.
When I came back from vacation and went to start it, the starter motor sounded as if the battery was worn out (it had a hard time turning) but the battery is new, but I managed to start it but in low the engine died (it turned off), it only worked in high revs, I took a lap and thought it had to do with standing still or maybe some fuel (but the carbs are freshly made by Carburadores Conrrado, which are pretty good.) The next day (yesterday) I tried again start and it cost me god and help but in the end I managed to start it but after going around the block if you didn't speed it up it would stop, after several attempts I managed to start it but it sounded bad (as if it were on 3 cylinders) and then it definitely stopped to boot.
Trying to start it over and over again is what started to smoke from the ground wire between the alternator and the voltage control unit.
This morning I changed the burnt cable and when trying several times to pull it out the new cable melted again.
I'm pretty sunk because I don't know what could be causing this problem, I don't know if the car that doesn't start is related to the burnt cable or the burnt cable is simply from trying to start it repeatedly forcing the alternator to work a lot.
I don't know what to do.
I'll be back tomorrow to change the ground cable for a new one (the one that connects the alternator with the voltage control) and I will check the ground connections well.