Quote:
Originally Posted by radioagogo 
Danieloneil01, Sounds like the problem is in your spark plugs, depending on the make, model & year, you ,might have non-resistor plugs, you need resistor plugs. But you also need a better ground for your radio’s antenna. run 16 gauge single conductor medium to heavy jacketed wire to the back of your radio and attach it to the chassis, that’s why you have a constant hum. "ground loop" on your AM radio stations. The antenna isn't fully grounded and this will cause the Hum. In short positive power is not fully discharging to the ground circuit and since it has no place to go it disperses through all the circuits in your radio, including speakers.

Danieloneil01, Sounds like the problem is in your spark plugs, depending on the make, model & year, you ,might have non-resistor plugs, you need resistor plugs. But you also need a better ground for your radio’s antenna. run 16 gauge single conductor medium to heavy jacketed wire to the back of your radio and attach it to the chassis, that’s why you have a constant hum. "ground loop" on your AM radio stations. The antenna isn't fully grounded and this will cause the Hum. In short positive power is not fully discharging to the ground circuit and since it has no place to go it disperses through all the circuits in your radio, including speakers.
I tried the ground (is said GRND on it and it's black) wire but it didn't help at all.. I didn't see any other type of ground wire coming from the radio. I will say that I tried to hook up another antenna but it had a booster on it and it did help but inside the car it didn't come in very good and there's no way I'm going to drill a hole for it on my car.
I did changed the spark plugs when I first got the car. It's a '02 Honda Civic Hatchback SI.. I could change the spark plugs since it's only a 4 banger and cheap..















