Okay. Could be a problem with grounding. One or two bad grounds can cuse havoc on older electrical systems. Trace the ones you can and make sure they are clean and have a good connection. Then make your own ground straps. They can run from negative battery to chassis, chassis to engine, to anywhere near distributor, or near anywhere that is problematic. You just need to keep in mind not to overfeed an area, try to make a grounding, "circle", for a lack of better words.
The car computer or voltage regulator could also be at fault. Otherwise there is not much more I can suggest.
I hope it works out for you.
Friday, September 16th, 2011 AT 4:38 PM