Stopping Engine noise Interference

Yes, the noise is only coming through the subs.  while playing I turn my bass control up and the noise gets louder, down and it gets quit.  I thought that may be part of the problem so I unplugged that and it did not help.  The only time the noise goes away is when I unplug the RCAs.

I will try regrounding the amp once again.  I would think if the amp was not grounded  good enough, it would play at all.

Do you see this problem offten?

I re-grounded my amp and I am still getting noise through my subs.  I have checked everything I know and it won't stop.  I ran new RCA and that didn't work.  What else is there to do to stop this.  There has to be a solution. 

I am using a Coustic XM3e crossover which should filter some of the noise out.  When I had my stuff installed the tech hooked in to my ignition wire to server as the remote for my amp and Xover.  Would that cause a problem?

While my car is running I am getting noise through my subs even when my Deck is off.  When tured on it is louder, when Bass is turned full and deck volume down, interference louder as well.

I bought one and hooked it up and it stopped the engine noise but it also killed some of my bass.  I reasearched the isolator and found it will cause you volume of bass to be less when using the isolator.  That problem only occurs when using an older amp, late 80's early 90's.  My amp is about ten years old. 

The install shop used the ignition wire as the remote wire before I installed the Alpine.  Do you think that may cause it? 

just like he said use a ground loop isolator it will help