So my car hasn't been running perfectly for a while now. When idling it often stalls. At speed it runs well, no issues, but if I sit at a red light for more than a few minutes the revs will drop the engine will cut out. It hasn't been anything more than a nuisance so I've been putting off dealing with it. I figured it could be a lot of things, maybe some bad fuel or a bit of a clog in a filter, and so maybe it might just work itself out if I run the car a little more.
But over the weekend it stalled in my driveway and as I was trying to start it, it misfired. A very loud misfire, very expensive sounding. And then when it started it ran terribly. It's thrice as loud now and sounds a lot like a Singer 132K6. I took a quick lap around the block and it was backfiring on the overrun and people were looking at me. I think possibly the crack in the Y-piece of the exhaust may have become a gaping hole, maybe that's all that happened. I'm going to take it to my mechanic so that we can take a look at it, hopefully this week.