Help me please!!!! I have an intermittent ignition noise thru speakers on my 94 GT with Mach 460. It comes and goes, sometimes is tollerable but most times it's so bad I have to unplug both amps just to listen to stereo. I have checked all the grounds and have gone as far as to run additional grounds at amps and from the engine to the body. Has anybody else run into this? Really don't want to tear everything out and replace speakers with aftermarket and re-wire.