can a bad battery cause a car to misfire Bad battery causing a misfire?.if the voltage is low it can cause the misfire.i doubt the battery had much too do with the misfire.but after 5 years Random misfire and a bad battery? 262ci forum.random misfireit can cause your alternator to "overwork" itself. Bad battery causing a misfire?.if the voltage is low it can cause the misfire.i doubt the battery had much too do with the misfire.but after 5 years Could a weak battery cause misfire + irratic idle.bad battery" t...