I have a 1995 Nissan Maxima, and having the same issue as Sal described. However, mine happens without the AC on. Smoke comes from all around under the hood, not just one side. I can’t tell if the burnt smell is rubber or some fluid. My mechanic can’t look at it until next week, and I have to drive 30 miles each way to work. Sigh. I appreciate the answers y’all have given Sal, as they finally have given me some clue as to what is going on with my car! Just have to decide whether or not to get a rental car until I can take it in. Thanks again.