- Thu Jan 01, 2009 2:15 am
#86394
Ignition noise is caused by a bad ground which is almost always a result of a non-professional install. You want to use a wire wheel on a power drill and take the paint all the way down to shiny metal. Then you use a couple of SHORT metal tapping screws and a lock washer on the ground cable's ring terminal. It has to be a part of the chassis preferably the frame rail. Some parts of the chassis are tack welded or only glued to the frame rails, so there isn't a good connection back to the battery chassis ground. ANY resistance is going to cause engine noise.
Another thing you should do with 4 channel amps is branch off the stereo's ground with an 18 gauge wire and run it all the way to the amp's ground.
Use quality RCA's and route the power cable at least 18 inches away from the rest of the amp's wiring including the remote turn on. If you have to cross any wires, do so at a 90 degree angle.
But on many cheap amps the ground goes bad internally to the amp.