That it makes my car stall. I google searched for "ac makes car stall 03 cobra" but for svtperformance, results all seem to be about older cobras. So, is it the alternator? That what I'm going with. Stalled at idle in my drive way. While driving, the Rpms drop slightly and I can feel the steering tighten up. I changed the alt pulley when I upgraded to a 2.93/4# set up. So who's got that golden answer?