I hooked up my Amp and im getting alot of noise. sometimes i get the high piched engie reving sound, and sometimes i get a really bad scracth or something when i hit bumps. can anyone tell me wut wrong?? anything would help. thanks in advance.

 

Check your wiring and make sure it's not routed past electric motors and other electronic devices. Keep it as far away from the power cable as possible also.
Try using some plastic shrouding.

 

run your RCA's on the opposite side of your power wire, also, wrap it in electrical tape

 

thanks dude that helps alot because on rca cable is right next to the power cable.