i cured mine with a good electronic ignition and new wires(plugs etc were all
new at the time also). spark has to be good under pressures turbos give. just
try one of those old champion plug testers that had air pressure in a chamber
that you could see the bottom of the pug in. same idea. also make sure the
breaker plate has a good ground . just get ALL your ignition stuff up to snuff!
regards tim colson