help!! voltage meter boucing, engine lurches when i drive uder 30mph
my 94 bonneville, god bless its heart, is still running. but my most recent problem, i the voltage meter on the dash keeps bouncing, the lights dim and bright with the bounce. the tach bounces ever so slightly along with it. when im under the hood i hear a faint tick as the meter starts it desent. ive checked connections to all plugs and coil packs, battery as well. all seem to check out. alternator was bad, and has been replaced, but problem persists. ignition module was tested and checked out fine as well. when the battery was tested with a hand held voltage meter, it was bouncing from about 13.4 to 12.5. heard a few ideas about fuel filter, bad gas, plugs and wires, serpentine belt. not sure which way to go. oh and no dummy lights pop up at all. please, help!!