Hey everyone, I'm new to the forum but have lurked for answers for a while. This issue has happened to me twice so far that it left me stalled in the road and I'm not sure exactly how to pinpoint it. I bought a 95 Pathfinder with auto transmission in November and in January for seemingly no reason the RPMs seemed to drop really low after I had been running errands and left the car parked for a couple of minutes. This happened after the engine had been warm and driving for a while. When I was coming to a stop at a light, the car stalled. I was able to start it no problem but the car would keep stalling unless I kept the revs up. Luckily I was close to home and when I got there I checked the codes and none showed up.
After I checked the codes the car seemed fine and drove fine for a week and I brought it in for an unrelated timing belt replacement. It's been a couple weeks since then and the car has been fine until yesterday which was the first day I had used the AC (maybe since the initial stall). The car sounded like having the AC on was using a lot of power: some RPM changes, at a stop it would kind of 'lurch' a little until finally the revs got pretty irregular and the car stalled again. Again, I could start it fine and I turned off the AC and drove home and by the time I got there it seemed to be totally fine.
Today I tried to replicate the issue by just running the car in drive (but at a stop) for a while with the AC on. The car eventually started running odd and eventually the RPM irregularities returned. Not only that but the car took 2-3 times to start only when warm and I've been noticing a weird no-crank start on some trips lately but haven't been able to pinpoint a cause. A video of the irregular idle is here: https://streamable.com/sh1lh3
Anyway sorry for the wall of text but I want to take a long trip soon and don't want to worry about this weirdness. It sounds like a vacuum leak but could that be so intermittent? I've sprayed some carb cleaner on the lines earlier today and noticed some rev changes but can't be certain if they were accurate - when the engine warmed up I couldn't get the spray to change revs.