So the fun with my 400k gs3 continues. So after it died in traffic on me thanks to a bad alt. I have a new alt (tested good before I left the store with it) and a new battery. Driving it today and it gave me some wierd problems. First the blue "brights" symbol flashed when I dropped my parking brake but went on my way. 15 mins later it gave me a mean misfire and a cel, stop at auto to have it read. It gave me a p0420 for catalyst efficiency and c1241 for low positive voltage. I get home crack the hood open to see if anything is wierd and the throttle motor (black thing that protrudes from throttle body) is clicking whenever I give it even a little bit of throttle. So I am completely lost on what the problem is. Also recently replaced blown alt fuse when I forgot to disconnect the battery before removing the old alternator.