i have engine whine still coming thru my speakers..

i have a kenwood headunit
400w clarion amp powering all 4 door speakers (4 channel)
600w directed 600d mono amp for sub
twisted pair rca cables ran away from power cables
brand new 130amp alternator
2 4gauge power wires

 

you got your power ran down one side of the truck and rcas on the another?

 

Intank fuel pump.

http://consumerguideauto.howstuffwor...d-ranger-2.htm

Scroll down to audio.I've had this problem in every Ford I put a cb radio in.

Here is the fix I'm doing this weekend :

http://97vette.com/sporttrac/rfi_fix/rfi_fix.html

 

When I had that problem when I had my acura legend, when I wired that, I wrapped the RCA's in Foil. The problem decreased, but didn't completely go away. it made a big difference though. Try it

Make sure your RCA's and Power cable are as far apart from each other whenever possible. Thats the big thing

 

try moving the ground to a better spot too...

 

its grounded to the passenger side seat bolt

 

power wires are ran on the driverside of the truck and the rca's are running down the passenger side

 

did you ever do the mod? if so how did it work?

 

Change the ground. I had the same thing with mine. I changed it to a bolt on my booster seat and the whine was gone

 

if your rcas are any where by each other make sure they cross at a 90 degree angle and it should eliminate your rcas from picking up that power signals, or your rcas are bad and your amp is bad. Goto best buy and pick up a ground loop isolator should solve your problem if the other two didnt