engine noise from speakers

[raider]

Like the title says. I have engine noise from my subs and my speakers when the head unit is off. When i turn the head unit on the noise goes away. This is in a gmc sonoma.

[chasingsafety]

where did you run your wiring? Anywhere near the stock harness will cause this, also shitty plugs will do it, as well as crappy plug wires

[raider]

signal runs passenger side, power runs driver side. I ran the power wire close to the stock harness.

[raider]

When I disconnected the power to the amp the noise went away.

[iceracer]

Faulty plug wires will cause a noise. There should be a capacitor on the coil. Missing or bad will cause a noise.

[Cornhusker91]

What type of amp do you have? Some amps will produce engine noise. I had an amp that kept producing engine noise (alternator noise) and that would play through the speakers in the car. It was very annoying.

[Alwayssideways]

ive also seen bad grounds do this as well

[chasingsafety]

I had the same problem with my jetta, I changed everything, even all new wiring kit and same issue, swapped out my bosch spark plugs for denso iridium's with built in resistors and the issue went away

[raider]

Found out the problem. Cheap Rca cable and also I had ground loop isolator and that also caused the noise.