Del, a question for you.
I'm not familiar enough with these to be too specific. MSD makes a lot of energy, but so would have the factory stuff
What do you have for an antenna? A broken coax shield could do this. Another is poor hood grounding. Try running at least two ground braids from the hood to the firewall, leaving just enough slack for the hood movement.
Two-way shops normally have add on springy contacts that you screw to the hood or fenders so that when the hood closes, ground shield is improved
Where is the actual ignition "module" if you will? That is, whatever actually generates the pulse and feeds to the coils. If this is poorly grounded, could be a problem. So could wire routing, "lay." Just running wiring "close" to ground, IE cable dress will affect noise radiation.
So will two conductors improperly routed too close, as in power going to some interior device. If you have any added wiring, tach, stereo, CB take a good hard look or temporarily disconnect.
Sometimes bypass caps help on power leads. The old old "standard" used to be "coaxial feedthroughs." You don't need those, but wiring in wire lead ones, need to be careful as to not cause shorts
I haven't seen any for years, and had a hard time finding a photo, LOL
I'm not familiar enough with these to be too specific. MSD makes a lot of energy, but so would have the factory stuff
What do you have for an antenna? A broken coax shield could do this. Another is poor hood grounding. Try running at least two ground braids from the hood to the firewall, leaving just enough slack for the hood movement.
Two-way shops normally have add on springy contacts that you screw to the hood or fenders so that when the hood closes, ground shield is improved
Where is the actual ignition "module" if you will? That is, whatever actually generates the pulse and feeds to the coils. If this is poorly grounded, could be a problem. So could wire routing, "lay." Just running wiring "close" to ground, IE cable dress will affect noise radiation.
So will two conductors improperly routed too close, as in power going to some interior device. If you have any added wiring, tach, stereo, CB take a good hard look or temporarily disconnect.
Sometimes bypass caps help on power leads. The old old "standard" used to be "coaxial feedthroughs." You don't need those, but wiring in wire lead ones, need to be careful as to not cause shorts
I haven't seen any for years, and had a hard time finding a photo, LOL
