Got ignition noise in AM
Went to Best Buy for something to suppress that.
Mot many answers.
Actually for my Ford E 359 wlrk truck,but this should apply across the board for ingnition noise suppression.
You might need rfi suppression plug wires and resistor plugs. Your manual or somewhere online will probably show what your application is. Also check grounds and make sure the connector on the antenna wire is shoved all the way in to the radio. Lastly, these are probably the best noise blocking wires around. http://www.magnecor.com/magnecor1/truth.htm
X2 what Shooter said! If noise persists, you could try running a short length of braided copper from the hood to the engine compartment. Be sure to remove any paint at attachment points and add silicone dielectric grease at those attachment points afterwords. Also check your shop manual to see if the alternator is supposed to be equipped with a capacitor in it for RF suppression. If so, it may have become disconnected or worn out. Can't over emphasize Shooters suggestion on checking grounds. Any loose, lost, or shaky grounds can cause or allow lots of noise through to your sound/radio system(s).