From throttle lag to complete unresponsiveness
 

Hey guys! Very new to this forum, but looking for some help.
I have a 2011 maxima with 180,000 miles. Over the last couple of days the throttle has started to have a terrible lag in it. It will usually take a couple of seconds after pressing the pedal for it to go it has gone to no response at all. can anyone help me?Thanks in advance!

Is the throttle responsive in neutral? If ok but intermittent in gear, i would get the charging system checked out soonest..
especially for high ac voltage ripple. This is how my first alternator failed.