bad alternator? erratic rpm needle / rough idle
I stopped and got gas on the way home yesterday and after I hopped back in I cranked it back up. Instantly it was running rough at idle and would sputter when I gave it gas. The RPM needle was literally bouncing around all over the gauge (almost like when you reset a cars computer and crank it up for the first time) but the engine remained idle but idling a little rough. Could this be a symptom of a failing alternator? My voltage on the gauge has always been below the 14v a little ways. It typically stays between the first line and the 14v mark but never exactly 14v even with everything off.
Since about March of this year I have put in a brand new battery in it back in March. Since then I have replaced 02 upstream, crankshaft position sensor, plugs, wires, rotor cap, ignition coil, ignition pickup, catalytic converter, muffler, exhaust manifold.