I have a 96 civic coupe 1.6 single cam...recently everything on my car pulsates pretty much...the lights dim in and out really quickly and when it gets real bad the tachometer just goes crazy. I changed out the alternator, the alternator belt, and put in a brand new battery all at the same time...and i'm still having the problem. When i shut the car off..it won't start again...i have to jump it. The battery just won't stay charged...and it's not the alternator because i just put a new one with the belt. Any ideas? I'm stuckk ?