Fuel pump noise? Probably RF radiated? Needs a suppression capacitor?

One suggestion from someone I know was that it's possible that my high output alternator is causing noise on the constant power line of the empeg. The direct line to the battery passes within 18 inches of the alternator; possibly even closer. I tend to overestimate measurements.

I never heard the term suppression capacitor. But someone suggested a power line noise filter, if it is determined that the noise is coming down the empeg's constant power line.