Yesterday we had a pretty significant rain, and hit quite a few puddles on my way home from work. Must have hit something I shouldn't have, because I got a bit of a rough idle. I got home after dark and it was not bad, I figured I'll let it dry out.

This morning I got in and headed off to work. Fine at idle, but almost like a miss under load. Still plenty of power to go though. About 30min into my trip, I got a beeping. At first I thought it was the truck behind me, as the sound sounded like it was coming from the rear. Sure enough though, it was me. 4 beeps, I think 4 times. After that nothing, and kept on driving. Slight vibration under load, not much at cruising speed or idle.

No odd sounds from anywhere, but I didn't get to far into it. Popped the hood to check my coil pack repair from when I blew a plug a few months back. All was good.

At work now, I might run out at lunch and get under the hood again, but not sure where to start. The beeping coming at the same time as the rough idle really bothers me. No engine lights, all parameters showing normal. I'm at a loss until I can get deeper into it.