Russel, It is hard to understand what you are saying (even after reading it 3 times ):
- voltage has nothing to do with opening of the trigger points. Cams on the distributor shaft cause them to open and close.
- If distributor wasn't tightened down, it may have moved and that affects the timing.

If car won't run properly, get the mechanic to put it right.

__________________
Graham
85 300D,72 350SL, 98 E320, Outback 2.5