What causes engine noise when my amp is running and how can i stop it.?

Question

i tried moving the ground but that made it worse

Answer 1

Get yourself a Ground Loop Isolator. Something like Radio Shack part number 270-054, http://www.radioshack.com/product/index....

Answer 2

do not get a ground loop isolater you will lose up to 3db of gain you will need to identfiy what kind of noise it is clicking whinning i found noise can come from cheap rca's, power wire and rca's running together , s******g your amp to metal/should be on a peice of wood/, bad  gounds are  like on the trunk lids or a seat bolt or on a tail light. gound wire should no be no longer than 18"s and scrap the paint off to bare metal and  using a star washer & selftapin s***w put as close to frame as possible if noise is still there check radio amp out  sometime there can be a cold sodier  inside the units so let me know

Answer 3

those 2 answers above are correct but you also need to consider where your power cable is relative to your red/white cable is. if they are ran through the car in the same place this could cause the noise.  the ground for the amp is not the only ground that cause this, most cars are grounded in many places (the engine) and if one is loose or has poor connection you will get this noise

Answer 4

That tells you it's a ground issue and you just need to find a better place.  Make sure you sand off all the paint where you ground.