no spark

i do have voltage running to the msd 6al. when i run the test in there trouble shooting instruction i do get a strong spark out of the coil. hense they say its hooked up correctly and should work
i do have voltage at the ballest resister and coming out of the bulkhead. could a faulty voltage regulator be a problem?
terry

Terry, I believe the voltage regulator only comes into play when the vehicle is running. Doubt that is the problem........

Do you have a buddy with an MSD box to borrow and test with?

Thanks for helping me....bump 4 u ............