I have a 68 torino with a 302, and lately my car has been dying when I'm in lower RPMs, stoppped at a light, or coming to a stop. I've also started my car, and while sitting in park, turned on my lights and my car has died. It dies more often when I have other things going like lights, radio, windsheild wipers. When it first started doing it, my car would just start right back up, but then it started to die and I wouldn't have any power for like 3 minutes, no lights, horn, etc...nothing. Then I figured out when it died and I had no power, that I could press the horn button rapidly and I would regain power, and I could start my car. I have a new battery, and I have had my fairly new alternator tested on and off the car. On the car it doesn't put out as many amps as it should, around 50-55 and its a 60 or 65 amp alternator, but off the car, the machine says its good. On one hand it sounds like not enough volts at low RPMs, but then I have the problem with totally losing power for 3-5 minutes. I also have a MSD ignition box, possibly a problem there. Maybe a problem with my coil. If anyone has an idea, please let me know. Thanks!

 

Not to go off track here, but find yourself on of the 100 amp single wire street rod alternators to fit and be done with it. The msd will not work properly if you do not have good voltage output/amp output. Is it MSD 6A, or digital 6?

 

MSD 6A

 

That stinks the digital 6 box has an led light that will illuminate if voltage is problem to help troubleshoot.